Ok much of /co/ said by other boards is the closet you'll ever get to Tumblr. If you don't use Tumblr. And to be honest it's kinda true
/co/ is the only I've seen for long time that been a hotspot of Fenian crap

While I do see feminist anons the most on /co/, it still not many, and they're usually shut down once they show it. That said it's still one of the more reasonable boards, next to /m/.