I dress like a teenage boy: jeans, baggy t-shirt, trainers, no makeup. I have always preferred to dress like this, and I got almost no hassle from men, even when I was young and beautiful.
Again, this is not something you are supposed to say, but lots of women's clothes are designed to make women look vulnerable (teetering high heels, tight short skirt, accentuated breasts, etc). As an extension, women dressed in a feminine way start to look vulnerable to the arseholes of the world. I found that if I don't look vulnerable, lots of bullies don't notice me.
I think women should be able to wear whatever they like and not get hassled, obviously.