So I'm very curious to know if what happened to me at a certain fast food place, that shall remain nameless, has happened to anyone else? For the second time yesterday, I order my food, pay with cash and instead of giving me my change back in full, the person kept a $1 tip for themselves and just gave me the change! 

Like I mentioned before, this is not the first time. It was a different person before this and again this was a fast food joint, not a sit down restaurant. Am I missing something? Since when is it ok to assume you are going to get a tip, and did this particular establishment instruct their employees to do so....since it's happened to me twice now with 2 different people? Has this happened to you? Would you have said something? (I did not)