Having been on their mailing lists and IRC channel for over four years, I have seen maybe a handful of "edgy" comments that made me go "sigh" or "Ew!" and they are generally from two or so people that are on the fringe of the community. Yes, it is possible that this is some sort of elaborate trick, but they sure give the appearance of mostly a bunch of helpful folks that care deeply about their own code and projects while caring very little to police people and rather just ignore them.
Oh, there are also the edgelords occasionally lured in by Luke Smith's videos (who has never sat foot in community or contributed code while I have been around and I am not sure if he ever did) who usually get laughed out of IRC after delivering an unhinged chanspeak rant.