I think the biggest thing is, people ordering something and wanting it a special way. Then they get butthurt when it isn't perfectly custom to their order. These people are working fast food, generally, and are either in a terrible place in life or working their way through school or something on a path to better themselves. As they should be. Why people think that they should give a ratsasss about how they want their burger is beyond me. If I order a burger, sometimes I say no pickles. You know how many times I get no pickles? About 50% of the time that I ask. You know how many times I bitch about it? 0% of the time, because my time is more valuable and I just don't give a schitt if some snot nosed punk, or a middle aged person on the verge of eating the business end of a shotgun, or someone who is probably stressed out about a test at school F's up my burger. They make 1000 a day the EXACT same way, but when someone orders it different and they are just going through to motions mistakes happen. My solution, order wtf I ACTUALLY will eat and stop thinking I am so special. Here is a secret, you are insignificant and no one gives a schitt if onions mess up your stomach. If you can't eat onions, don't order something that comes with them! If you happen to want special treatment, be hopeful, be nice, crack a joke and try to pull them out of the fog that they are generally in and that usually does the trick. Being a decent human is 90% of most peoples battle. If they mess it up, remember YOU stepped out of the norm, not them. If you ask for a correction, do it nicely and tell them thank you. They deal with whiney asssholes EVERY DAY. Don't add to it.