If you don't yet know about We Hunted the Mammoth, you should. It's owned and operated by a white guy who does actual good ally work. He uses the protection his male privilege affords him to document and call out MRA activities and general bullshit. Mostly bullshit, really. They don't have many activities other than whining. Except for harassing women, of course.
Here's a good starting point for those who don't know much about MRA's or other anti-feminist hate tactics:
7 Tactics of Highly Effective Harassers: How A Voice for Men’s Internet Hate Machine works
I've had this bookmarked for a while and finally read it. It's 100% consistent with everything I've seen and experienced.
Again, imagine the good these men could do if they directed all of this energy they use being fucking horrible to, you know, actually helping men. Like the black men being killed by police. Oh wait, they're fucking racist, too.