I've not had it happen often. It's more catcalls than people throwing things. I also walk a lot so I've most certainly had water balloons thrown at me and an egg or two around Halloween. It's just kids. I certainly did stupid stuff like that too to amuse myself. The only time it really freaked me out was when I was sat on a wall waiting for my friend having just read a story about an acid attack. I'm not sure what happened, I don't know if someone threw a drink out or what but it went all over my face and I had a few seconds when I honestly freaked the fuck out. Maybe I should start a gofundme?