What do you mean sadist? in terms of what dude? But as far as I know there are some managers are taking advantage of their position to cheat the campaign, like some are cheating, stealing some token of their participants, sometimes they will kick you out without any reason after the hard work you've done for the campaign, then sometimes managers got tempted because of a huge amount of money when sending the fund to them for the budget in bounty project.
If you find anyone doing that, then it is your responsibility to let the community know. Also let the concerned people who are involved in the project know. This will cause the bounty manager to lose its job and trust in the community. As far as I know, no bounty manager would do anything without any legitimate reason. They get paid more than they will be able to scam.