I proposed Security Deposits for bounty threads a few months ago but it didn't really catch on. The concerns were similar like in this thread that doing that would give members a false sense that the project is somehow vetted and secured by the forum itself.
I am for any kind of improvement that would distinguish good and reliable projects from scams.
Quoting my own thread here as a reference.
This is an interesting concept so if I'm understanding correctly they would be paying into an escrow as a security deposit and lets say something did go wrong would that then be distributed out to those that have been affected by the coin? The logistics of that sound like a nightmare but in theory a good idea. Having a large substantial amount in a security deposit which will then be used to reimburse those could be a good idea. I think this would only be relevant if the project scammed and not because it failed though as even good projects fail to realize their potential.