Erin Bailey is a fellow blogger on Squarespace, and she has written a powerful essay on what she faces on a day to day basis. As a woman and a fitness blogger, she runs up against some of the nastiest misogyny you can imagine.
Honestly, just leave people alone. You can smile, you can wave, and you can appreciate how much better this world would be if people would stop acting like assholes. What you can't do is sexually harass someone just because they are exercising in public.
I blame hookup culture. There are some men who know that it is a numbers game. The more women they accost, the better their chances for being accosted right back. Never mind that 1,000 women have to endure endless amounts of sexist bullshit--it's all about getting lucky. There is something to be said for granting other people the space to live their lives in dignity.