snip
Some Bounty Managers already made a solution like issuing a
weekly report form via
google forms 
But the problem is with the participants who doesn't read (or actually don't care with) the rules and still posting their reports. These kinds of participants should be disqualified immediately so they'll (if they're not a bot) learn to follow rules.
Wow this is a great solution by now. Which manager made this innovation? It should be appreciated by all of us especially all of the bounty managers, because it is their job to control their "workers".
That is not a problem at all in my opinion. If you are the manager, then you are the one who made the rules, and the rules should be followed by all of your workers. No money for workers who do not follow the rules. Simple as that.