There is no difference between a newbie and well-known manager when it comes in handling a project. If the project will deceive bounty hunters, managers can't control that. Unless if they will pay in form of weekly basis (btc).
In altcoin bounties, we expect that 95% of bounties are waste of time. Even they handle by reputable managers. Look at Sylon, Sandra Evans and Btcltcdigger. They are good CM yet they still handled scam project.
If you feel that a CM has dark plan, just stay away in it's thread or better to conduct a research of it's legitimacy. So that, you will be able to tell to the community to avoid supporting that project.
On point, it seems like its the project itself is the problem whoever handles the campaign doesn't matter since it depends on the owner, the problem is the owner of the project.
Well, we also see some bounties where the manager tries to scam some of the payments in the participants since high ranks could be more trusted than newbies you also have a point but doesn't affect the campaign if its a scam campaign.