Stepping in and telling a man to leave a woman alone is a good way to get into a fight. It easy to do, but it's dangerous. When the cops come, they'll throw both of you in jail. If you want a man to have your back, try cultivating a healthy relationship with one first. That's hard to do when you're a self-proclaimed misandrist. It's also a bit naïve to rely on the kindness of strangers, especially when you hate them.