This puzzles me. Would you elaborate on the reasons why you found it distressing?
I thought it could actually encourage another suicide. Suicidal feelings are ubiquitous, and the actual act is not that uncommon. When it's committed it's often a very disproportionate response to misfortune, or even to a mad self-hating inner monologue. I think the sober discussions that take place here about when misogyny, murder, or torture are warranted are mostly in bad taste, but I find it implausible that they will cause a harm worse than offense. Not so for a sober discussion of when suicide is warranted (even though it is not "offensive" in the same sense!).
A long blog post explains why the author, a feminist, is not comfortable with the rationalist community despite thinking it is "super cool and interesting". It's directed specifically at Yvain, but it's probably general enough to be of some interest here.
http://apophemi.wordpress.com/2014/01/04/why-im-not-on-the-rationalist-masterlist/
I'm not sure if I can summarize this fairly but the main thrust seems to be that we are overly willing to entertain offensive/taboo/hurtful ideas and this drives off many types of people. Here's a quote:
The author perceives a link between LW type open discourse and danger to minority groups. I'm not sure whether that's true or not. Take race. Many LWers are willing to entertain ideas about the existence and possible importance of average group differences in psychological traits. So, maybe LWers are racists. But they're racists who continually obsess over optimizing their philanthropic contributions to African charities. So, maybe not racists in a dangerous way?
An overly rosy view, perhaps, and I don't want to deny the reality of the blogger's experience. Clearly, the person is intelligent and attracted to some aspects of LW discourse while turned off by other aspects.