To improve security I would suggest that staff or theymos either do the escrow or get real life id and collateral from anyone running any kind of business from banking, investment and ponzi schemes.... And give them some commission to make it worthwhile etc
In layman's terms, anyone who's holding the coins of the community for any reason should be held more accountable than what we have now
Its not the perfect solution but it would certainly cut down on scams where people trust an account with hundreds of posts etc
This would allow the staff to scam and the staff are not (AFAIK) vetted in any way outside of what is publicly available on the forum. It would also effectively be moderating scams which is something the forum does not do (if you moderate a scam then if you miss one then the forum is effectively endorsing a scam and could be held liable). It would be a guaranteed way to get the forum involved in litigation as people would have disputes that the forum would need to resolve and when one party does not agree the other side would almost certainly initiate litigation if the amount in dispute is large enough.
You are asking to be protected from others' actions but it is your responsibility and your responsibility alone to protect yourself from scams and you need to use common sense before you buy, sell or invest in something.