There is an IRC room that is probably more accepting of QC fans, the server is irc.questionablecontent.net ad the room is #qc. At least I assume it would be more welcoming, but I haven't been in there in years, and the people in there are basically a whole other community, where a number of them aren't on the forums (again, I am going form my old memories of it, so that might have changed).
Maybe try going in there and seeing if you like it? They might not care if you talk about the comic, but as people have said, the meebo and other IRC room set up already will not be that welcoming, especially if you mention the comic and the QC Discussion subforum. Or, I mean, you could try getting the meebo password from on of the Infinite Pony Debates regulars and try your luck!