If it's ok for women to wear what they want without it being used as blame for them getting raped, isn't it kinda weird a guy isn't allowed to "wear" what he wants without coming under scrutiny as well?
I mean, it's one of those things where technically it's right but it's obvious the rule cannot be uniformly applied (I'm speaking in general, not just this situation involving wagging your dick at people) but in order to be fair, that rule has to come into play. Some women run topless or completely naked at these Slutwalks. That's a means of protest, right? Maybe this guy is protesting in his own way. I think he's being a troll, but there's a message behind it too, right? That he sees Slutwalks as kind of stupid and maybe just educating people the technicalities of consent to sex? I dunno.
He's trolling and he has the freedom to do so. Slutwalks are stupid, this guy is stupid but funny, and in the end, the Slutwalkers look stupid for being distracted from their walk over someone like that guy.