Giving Up On MSN Instant Messaging Due to Spam

After a couple weeks of an absurd volume of spam messages (almost all exactly the same), I've decided to stop signing on to MSN messenger in Adium. I think I only have one friend who still uses it anyway, and I can get in touch with her on Facebook anyway. I've also seen quite a bit of spam to my Yahoo! IM account (though not as much as MSN), but that's the service ThoughtWorkers mostly use, so I can't really give it up. I've still never gotten a single spam message on my GTalk or AIM accounts.