Some do, some don't, more like nagging than harassing. I gave the money cause I wanted to get rid of him. They bother young guys the most.
Funny story (around 17-18 years back) I was 10 years old, I was travelling by train in India with my mum. This snake charmer (so stereotypical !) came on board with a bag full of snakes and was showing his tricks. My mom is absolutely petrified of snakes, so was I, and that asshole noticed it, and he would literally shove the snake in our face, my mum threw couple of hundred rupee notes in his face and ask him to piss off!
200 bucks back then is like Rs 2000 in today's term, not a small amount.