I've thought about posting some really over-the-top shock/porn imagery to my Facebook wall, basically making it look like it was hacked. Maybe then they'll cancel my account, like I've asked them to do several times.
Random evil thought: could you sell your Facebook account to hackers? You've built up a multi-year reputation as a "known good" account; that'd be incredibly valuable to someone trying to generate cross-correlations between your interests and their product. After all, the whole reason Facebook is worth $300B is because they have all this data on their users; since it's your data to begin with, shouldn't you be able monetize it just the way Facebook does?
It could sour your relationships with actual friends. But if you're ok with them being deceptively advertised to, maybe they weren't such close friends to begin with...
More likely the hacker would rather use it to steal your identity and f. you over very, very hard. Much more lucrative than spoofing with a "known-good" account, right? So you'd really, really better trust those hackers you're selling to.
I would lean more towards setting up a script that will post whatever the 400th most popular story on Google News, thus destroying your demographic membership. Turn yourself into noise.