Upload & Sell: Off
Man personally I'm tempted to do away with comments altogether because I get so much spam on my comments form. Of course I have it set so that it has to be approved but it's super annoying.
You need to install a spam plugin! Seriously, this used to piss me off so much. I'd not login for 2-3 days and I'd have pages and pages of spam. This makes me wonder whether it might be best to only allow facebook comments... The genuine wordpress comments I have had are very, very rare.
EDIT: I've decided to remove wordpress comments and use facebook only for a while, just to see how it goes. TBH nobody really comments anyway, and if it's a real wordpress comment it's almost always another photographer which doesn't matter.