You DO realize his main goal is just increasing post count to boost his google search rating...by responding to him at all, you're only playing his game and feeding into the insanity. Fin knows his posts are idiotic, it's all in an attempt to evoke responses from people like you, and sadly enough, it seems to be working. Fight fin by ignoring him, and spread the message.
If his comments go unchallenged, unsuspecting individuals will read his comments, which are cached by search bots, not for fin, but rather for RIU. So in actuality he is really helping RIU. but anyway.. if his bullshit goes unchallenged, the unsuspecting folk may take it as gospel. and we certainly don't want that.
he has delusions of what search engine optimization is. just because you have a ton of comments on some random message board, does not mean you increase your search ranking in google. there is too much information to go into detail about this here, but take my word for it, he could have 50,000 posts and it still wouldn't make a lick of difference.
and lets suppose it did. lets say, for some odd fucking reason, i google search the term, "marijuana finshaggy", he might very well pop up as the first few listings.. then what? not real content, nothing sticky for people to come back to. he has wasted his time.
the only thing he is doing right now. in RIU, with his 12,000+ comments is add more page crawls to search engines... that's it.