I'm going to steal my coworkers mac n cheese
Why are you going to steal their food?
It's my coworker's birthday. I will do anything to show him he is not appreciated.
You shouldn't be taking their food. That is not a very considerate thing to do on someone's birthday.
This is my way of showing my disagreement with them.
Yeah but it's stealing. If your coworker got to know about it, he's not going to appreciate it. You will harm your relationship with them if you stole their food.