im 23 and Ive not really seen this as where I live is OK. However I was part of the bebo/ habbo hotel surge when I was younger and I can see how easy it would be for certain types of girls to become easily impressionable to feel like they have a boyfriend or something.
I do think it should be taught in schools the dangers of older men of any race. As I think equally any race can be guilty of this.
Interestingly when I was at uni there was always men of Eastern European origin or Black or asian standing at the side of the dance floor sort of lurking. I always had an uneasy feeling about them. Especially since they were alone. I always made a point of looking after girls I knew as they were obviously after one thing.