There are far worse things on the Internet, although I think he shouldn't have made such a post unless it was someone with whom he bantered before, approaching a new poster who can take insult in such manner is a bit inconsiderate. I think it's nothing bad really, and the stuff we see on this forum is nowhere as toxic as some other places, someone on the league told me my mother should die of cancer and my dads contraception failed, do I go on to make a post about how toxic the lol community is on their forums? No, I just brush it off as an extreme case of retardation, i think you should too, especially with so many people on here doing one post hit and run jokes.
Also to others wtf for having a mod just because it's a she? And that's not sexist at all? It should be an established member of the community and sex shouldn't be relevant in the slightest.
Disconnect and self destruct, one bullet a time.