I really feel that lolcows who join the farms should be addressed on a case by case basis. Some cows on the farms are perfectly benign, or even make their thread funnier (ie. barneyfag), while others need a leash so they don't screw up everything (ie. Fuckbot, Shaner.)
Also, this may be a stupid question but what exactly is and isn't reportable? I'm still new to forums based off chan-rules, so I can never tell when something is "notice me sempai" or

enough to warrant mod attention, and when I'd just be wasting their time.