I agree, sal. I also think it's actually not that effective.
In those never-ending debates about rape, for example, here's how it goes:
MRA1: Well, is it really serious rape when they're both really drunk and the woman has invited him home? She surely doesn't really mind. Come on!'
Poster like me: That is digusting. Yes it is rape. Here is a link to MN's own list of rape myths.
[many hundreds of posts later, including tearful rape survivors and increasingly unpleasant posts from MRA]
AF: [something very strong, breaking guidelines and calling a spade a spade]
[sound of relieved posters thinking, thank goodness, I felt awful.]
[several dozen posts later]
MNHQ: Hi, this thread was reported two days ago and we'd just like to link to our rape myths list!
[AF's post is deleted]
Two days later - MRA OP is banned.
*
See, you can post like me, and do the 'This is disgusting' line, and keep your temper (ish, cos I do sometimes lose it but on the whole I rarely get deleted). But it's actually not as effective when someone is posting something really profoundly misogynistic. And the MRA then gets banned. So it is hard to see who wins, really? The MRA has done what he set out to do quite comfortably, knowing there will usually be plenty of time before HQ gets onto him. AF will get another black mark, but HQ will subsequently accept that the poster was dodgy.
And the whole episode reinforces the idea that it's worse to attack rape myths (or whatever it happens to be) than to express them maliciously.