Facts, Many of my newbie friends know the risk on investing on rhis kind of scam scheme but they still choose to try it because they are tempted on the huge return for a short period of time. There still some ponzi scheme that paying early investors then just scam later which leads to some user keep on risking hoping that they will be paid as an early investor and neglecting the risk involved.
Then we have to say that some of them deserve to be scammed if they invest in something that is very likely to result in financial loss. It reminds me somewhat of gambling or playing the lottery because even though we know our chances are minimal, we will still give our money out of some hope of winning, while some others do it out of addiction.
At the end of the day, everyone should be responsible for their own behavior, and even that old saying goes
"as you sow, so shall you reap".