Can you block idiots from spamming your profile comments?

[PsychoYoshi]

Guys, stick to the question at hand. Elmo, stop flaming, I don't care if you're being sarcastic or not.

The answer to your question is yes; select "Profile", then "Customized Profile". There are check boxes that will allow you to allow only people on your Buddies List to post, or you can disable comments entirely.