Wow, you all need to go on a vegan diet or something.... Ever heard of leftovers from your own fridge....
If you are eating there all the time its a problem. Not if you only eat there on a weekly basis. If you are health conscious, you know what you can order at fast food resturants.
The problem with most of these places are the workers who don't give a fuck. They have to follow health regulations when preparing food etc. Not washing hands is a violation of those health standards/regulations.
But one fact is certain, it is that big Macs are tasty......