The tops of your beer cans are gross. You should always wipe a beer can clean before drinking out of it, and preferably just poor it in a glass. They get s**t all over them during storage/transportation. They get walked on if someone needs to climb over the pallet they are loaded on. And don’t get me started on some of the s**t I’ve seen inside beer coolers. Disgusting. Cans also don’t transport well on pallets. Cans pop/puncture and then that beer attracts flies which in turn create maggots. -former beer delivery guy

The larger the menu at a restaurant the greater the chance your food was frozen and just reheated.

Pilot here, The whole "turn off the cell phone" thing doesn't matter 99.99% of the time. HOWEVER, it's that .01% of the time that we worry about. Most cell phones nowadays, like iphones and androids, don't operate on the same frequency as the equipment we are worried about, but its that one guy with the cell phone made in mongolia in 1996 that's going to ruin it for everyone. Could we spend more time going through everyone's electronics and saying "You can use this, this, this, and this but not that unless we are over 14,500 feet." We could , but A.) it would take forever and B.) You wouldn't remember it or get it right. So please, turn the damn thing off when we're landing the plane.

Plumber here. There are so many things all of you are capable of doing/fixing around the home. I can't tell you how many toilets I've fixed, shower drains unclogged, leaks stopped etc. that took no tools/ or a simple tool, in literally 2 mins. A 15 minutes educational video on how most of the plumbing in your house works would lose me maybe even a few thousand a month.

High school teacher here: after a month of summer, I've already forgotten 90% of students' names.

You don't have to be an Orthodontist to do orthodontics, just a dentist. Don't subject your kids or yourself to braces/treatment unless the provider actually is certified in Orthodontics. It can make the difference between 7 years of treatment that reverses itself immediately and 11 months that lasts a lifetime.

Hotel manager. Most of the time the comforter is only changed when visibly dirty. Always take off the comforter and use the blanket in the closet, or ask them to bring you one.

When you ask for your drink 'strong' at the bar but refuse to pay for a double, we will just reverse the order of how we make your drink. Mix will go in first then liquor last. You think you are being slick by not having to pay for a double shot and you think we are a great bartender. Moral of the story: don't try to be slick with people who make your food or drinks.

I work at a living facility for special needs people. There's honestly a very slim chance that your family member would be abused by the staff. However, depending on where they are placed (based on a number of factors) it's highly likely they could be abused by their roommates and the facility won't do a damn thing about it unless forced.

Healthcare has become more oriented to customer service and satisfaction than patient care. Providers are at constant odds with administrators to balance profitable care with quality care which are polar opposites.

Planetarium operator: Nobody in the space sciences cares about constellations. They're used to help define the location of astronomical objects, but I bet most astronomers don't know the names of more than 5 or 6 constellations. I only talk about them because the general public finds them interesting for some reason - I would skip them if my boss would let me.

HVAC work, the amount of black mold in nursing homes is outrageous. If you're considering putting an elderly family member in one, glance inside the a.c. unit or look at an air vent, you can see it too.

There is a reason why your bar has loud music on. If you can't keep a conversation going you are going to be drinking faster and more likely to order another round.

Teacher - it's that time of year to make class placements for next year. Every year there are two or three teachers in the school (elementary) who are so awful, we cry over which students we have to 'sacrifice' to them and hope they are strong enough to survive a year with Mr. or Mrs. So-and-So.

Flight simulation engineer here: until Sully landed his Airbus in the Hudson, the average chances of surviving a commercial jet water "landing" were less than 5%. Highest recorded survival was the Ethiopian 767 with 29% survival. The seat back safety card and life vests were simply placebos for nervous passengers. Follow-on: Sullenberger's technique is now part of pilot simulator training so chances have increased. However if it happens in the ocean you might survive the crash but will almost certainly die of hypothermia, drowning or exposure.

Your city doesn't spend nearly enough making sure the infrastructure is decent.

Never. Ever. trust tripadvisor restaurants and their food safety just because they got high ratings.

Ramp agent here, I deal with airplanes from them coming to a stand, until they depart. Your bags get manhandled. We can have 150 bags off then on in a 15 minute window, they have to get from the cargo door all the way to the middle. Bags with 4 wheels are the greatest thing since sliced bread since they just roll. Sports bags with no wheels are literally hurled down. (We mean no I'll intention but there is no choice when you fly with the budget airline that rhymes with "Dryin hair"

The teacher's breakroom? That mysterious land of wonder that no student dare enter? Its a table and chairs with a counter with a sink and microwave. The teachers don't have fun in there. For their 15 minute lunch break, they just plan or grade.

Your nurses and doctors talk about you in the break room.