Interesting that someone wrote a whole article on this topic (not linked). I don't know why someone would need a whole article when it's this simple:
1. Be male.
2. Attempt to ally with feminists.
No matter how compassionate or honorable you try to be -- no matter how much you agree with them -- feminists will brand you "creepy." The only exception is if you have model looks and a lot of money. Then they won't. They'll scream about women being judged for their looks and then turn around and totally judge men on our looks. If you're good looking, you're not creepy. If you aren't, you're a total creep, and it has nothing to do with any of your behavior.