It seems pretty normal. I wouldn't take it personally, these people don't know you, they are immature people that feel the need to do this. I have had people yell "run forest, run" when I was out running and know people do this to people. For some reason there are people that feel the need to cat call or yell at others, probably to make their lives feel more interesting, they are bored and don't care about your feelings. I had a friend who would cat call women and yell things like "you are beautiful" it would embarrass me since i was usually driving and he would get flipped the bird for it. But I would always ask him why he did if he thought the woman would say, "omg stop I want to talk to you." His answer highlighted his view that women are just objects for his viewing and other pleasure. Many men are like this, they think its a complement and the other end is that if they aren't delighted by a womans looks they think its their right to let her know.