Bad feeling? Bad feelings affect all sorts of decisions, so what? That would be different than, say, YC telling companies not to do so, and the companies agreeing en mass. That would be a conspiracy of criminal conduct. But most YC companies are so small that the idea of taking a person from another tiny company, YC or not, probably would cause a "bad feeling". Give the tiny companies a break. God, I interviewed at one and they asked if I was married and had kids, because if I did, then it wouldn't work out. The answer was no, and no, and the important one was also a no. They will get better some day, but when they are so small, it doesn't matter.