Never seen that happen here.

It happens, but in a more subtle way. Usually direct comparison's don't happen, but rather is expected to be inferred by the quality of arguments, whether they can prevail with their line of thinking and so on. In a sense, that variant of 'rationalist' is rather crude in comparison. I am trying to think of an appropriate example, but I am struggling a little.

Make no mistake, there are egos at play here too.

Did you win the Putnam though?

Yeah well I've never seen violence happen in the rationalist community, but I'm sure if I keep looking I'll find instances of Hacker News posters committing murder too.

I feel like it's reasonable to assume Hans Reiser would have been on hackernews if it had existed before he murdered his wife.

Reddit ;)