They actually did catch some people getting large portions of the reward pool in the past that it did turn out were fake and stealing other people's works.    It's been awhile, but really though this is uncomfortable TRUST ME if you would that it is a far better place with them putting forth challenges than it was without them.    So, yes to be challenged is uncomfortable but they don't know you.   If they assume that everyone is legit then we'd have the top posts being scam artists, as that is what it was for awhile.