Almost nobody has probably had that as their only experience. However, it only takes relatively few people to do that for thing to turn sour -- sometimes a single person is enough. And in a large enough circle, chances are someone is like that.

Since most people tend to avoid confrontation, that gives the kinds of people who want to take as much as they can (or to have their way in some other way) a free pass until someone does in fact fight back.

Hence it's not surprising if, in the big picture, it seems like "people" (as in enough of them to make it a potential issue) do in fact seem to behave that way.