At first the worst thing about haters is that often they have fake arguments. I believe that in general if you don't like something, you can either ignore it or at least use some kind of constructive criticism, so sometimes it is really annoying when you see that the criticism has serious flaws.<p>But recently I started to appreciate the value of lemming haters: who is not able to understand when to use or not a technology regardless of what other thinks, is destined to be a loser in engineering. Engineering is a matter of braveness, you trust your judgment, so you are able to do great things instead to follow the common opinions. So, what happens is that lemming haters create a filter for lame people from entering into a community, which in the long term can be a blessing.