Off topic or useless can probably describe most of sanjx's and op's posts along with most others on yobit and secondstrade and he's now wanting more kids he knows to do the same and that's why something needs to be done about these campaigns. When they realise they can get paid to post crap why not tell your friends or open multiple accounts to do the same every day?
I somewhat get the feeling that the demographic of most shit-posters is young adults who live in countries that have a lowish standard of living.
I don't think very many 15 year olds (or 12 year olds, or whatever year olds) would have very much use for the money they could earn from shit posting on signature deals. I would speculate that most miners that post here would probably have more of a genuine interest in Bitcoin, and would have some level of technical expertise.
A lot if not most of them on yobit and secondstrade seem to be from Indonesia or the Philippines. I'm not sure what their level of interest in Bitcoin is or if it's just to earn a bit of cash but they shouldn't be shitposting to get it either way. One thing I've noticed a lot from the Indonesian users is they tend to claim to be female in the profiles as well.