IRC is used by millions of people for all kinds of reasons - all of which revolve around the idea of meeting and communicating with other people. This includes making friends, dating, learning, gaming, scripting, or otherwise. So far, I've seen Google ads that cover a wide range of topics appropriate to the wide range of interests that IRC users, as human beings, have. As I mentioned in my previous post, Google displays ads contextually - based on the content and type of website you have, so there's no way to change what it displays, although I can block ads on an ad by ad basis - however I haven't seen anything particularly odd so far.
