I use Facebook as a source of amusement. I just come up with random inappropriate and weird things to say, which usually A) horribly offend people or B) makes them laugh uproariously. Either reaction is fine with me. That's just the way I am, always cracking jokes, and my sense of humor can be a little dark at times.

I'd say just be yourself. If you're weird, be weird. If you're funny, be funny. If you're intelligent, try to start intelligent conversations. It's your Facebook account, make it whatever you want.