Well there is nothing KWWH can do about it.
You remember the last 2 years of filehosts? Tons come here and some of them with they own script ( fileserve, filesonic, filepost, easy share..and the sister ones, like filejungle, uploadstation)...
Every last one of them turn out to become scam.
Everyone.. Except, till now, uploaded.to , rapidgator, and extabit.
So KWWHunction is doing what they can, ban obvious scammers and so on but you cannot ask them to do more then that really.
This situation is in real life too, you cannot avoid being scammed..Yes, this sucks but nobody can do more about this than yourself.