I would tentatively shift the focus on age groups. I believe (maybe wrongly, raise your hand if you never did this) that any (male) kid in - say the 10-14 age

I would tentatively shift the focus on age groups. I believe (maybe wrongly, raise your hand if you never did this) that any (male) kid in - say the 10-14 age range has made some "harassment", possibly of sexual nature, toward females (not necessarily of the same age group). Once they were "jokes" or "pranks" on the phone (of very dubious humour but that amused the kids a lot). I am not particularly surprised that on the internet, a new media where the kids have the same basic "protections" (anonimity and no need to show their appearances) the "tradition" continues.