I think the best way to start dealing with this scammers is withholding their coins even after they made correct payment until after a long time and pretending you didn't notice they made payment and filing an appeal against them. They do all these intentionally.
When I get paid, I don't only check if the funds reflected in my account, I watch the figures carefully. At a time I've been paid 182891 instead of 188291, had I not been very meticulous with inspection of funds, I would've released the coins meanwhile I was underpaid.
Again guys should be very watchful for the remarks section. Some of these guys are federal government agents and they'll leave a remark indicating that it was a crypto transaction and such account is at risk of getting banned. In such a case, you'll just raise an appeal, empty the funds from the account into another account and never release their funds. It's important you receive P2P funds in an account without much balance in case things go south.
Yes, all these are what we should be looking out for when carrying out a p2p transaction, because this scammers has gone wild and well advance in their fraudulent activities, so if you are not careful and observe enough you fit enter one chance for their hand.
And secondly, you made mention of the remarking aspect of the transaction, that part of it is extremely important, so always make sure you check carefully to ensure that there is no indication of crypto related write up that can jeopardize or put your bank account at risk.