My first job was at a French bakery. It's a decent sized chain in the states. A list of their transgressions against humanity:
I watched a pizza come out of the oven and fall toppings-side-down on an unusually filthy kitchen floor. This was on Mother's Day (busiest day of the year for a place like this) so it was scraped up (as instructed by a manager) and tossed back in the oven with a little extra cheese to hide all the c**p stuck to it. I was made to serve this to a lovely older lady and it haunts me to this day.
The cow. Holy f**k, the cow. This was what we called a huge fridge-sized milk dispenser that was never cleaned well. One day someone dragged this disgusting bastard out from the alcove it was in and, surprise surprise, nobody had cleaned under or behind it for months if not years. There was a several-inch-thick layer of spoiled milk with a technicolor carpet of mold across it. Makes my stomach turn just thinking about it.
At 16 I was given the prestigious position of baking all of the bread / pastries / etc.. It was all frozen and it was not at all uncommon for me to find years old boxes in the freezer. Those were all cooked and served.
Now, their transgressions against me:
I was sealed in a human sized proofing oven for about an hour because of a faulty door. It was on, at a low temp / high humidity, but STILL.
There was an actual oven with doors that opened like a kitchen cabinet (swinging open horizontally rather than open vertically) and it was placed around a corner at a high traffic area. Well, those doors did not move independently - they were linked so if you close or open one the other closed. I was leaned way into the f**ker and guess what? Someone closed one of the doors as they were coming around which closed the other door as well. This resulted in me getting closed in and it was at about 450f. I struggled out by pressing the sides of my forearms against the doors resulting in pretty severe burns as big as a two computer mice on each forearm. I was made to complete my shift.
Boxes in the freezer were stacked waaaay too high resulting in an avalanche of frozen cookie dough burying me in that b***h. I had to bang on the wall with my foot for about 20 mins before the sauté cook came and dug me out. Manager didn't give a f**k.
Allow me to conclude this by saying that I worked in several other restaurants during my young life and NEVER came across anything REMOTELY like this again. I've never seen a waiter or bartender f**k with another person's food - as far as I'm concerned that's a myth. I've never seen such atrocious cleaning practices anywhere else, not even close.