If you want to get downvoted on the Men's Rights subreddit on Reddit, just post something about how you were actually raped in a discussion of "The Campus Rape Myth." You'll get a batch of instant downvotes, and a bunch of Men's Rightsers questioning whether or not you're telling the truth, and demanding that you answer all of their questions.
Contrast this to what happens when a guy posts something on that subreddit about being falsely accused of rape or child abduction. No scrutiny, no downvotes. It's simply assumed to be true.
This is the internet, and it's pretty hard to know who is and who isn't telling the truth. But this is a pretty clear double standard, on the part of people who claim to hate double standards.