I just wanna give an advice, remove all privileges anons have, Before this site gets flooded with these kind of things!
http://illusioncards.booru.org/i...t&s=view&id=13310
http://illusioncards.booru.org/i...t&s=view&id=13300

good idea. let them comment, but can't post.

They shouldn't be able to post nor edit tags, descriptions, etc

right. need go awawy privileges from anons - posts and points.
anons and users go away from profile and troll)
there is no benefits for the site from freedom of anons.