I just left a tram where some German pretty boy tourist was trying to get into the pants of a girl way too young for him. So I stared at him. Directly into his eyes. Gave my most digusted, disdainful face. He saw. He started to fidget. Then he started looking scared. I did not break eye contact until he left. Have nice nightmares asshole.
PS only do this with white middle class men. They will not attack. They are not used to be prey and they do not know how to act.
also not worth the hassle . the more we all take a leaf out of your book the better make them uncomfortable very uncomfortable .