Every forum has scammers. It's something which has influxed on every forum other the last few months. In terms of time spent I'm a noob on MPGH so I don't know the ole tales.
Here's how to fix it:
You can't register using TOR or a VPN. Very easily to implement. Easy as just blocking public TOR nodes.
The next one is a lot trickier: If you want to sell on MPGH you must allow preauthorisation of your debit card to be used for any amount up to $1000. This is hard to implement but your major scams have been removed. You could apply this to buying but that's too hard to control.
Impersonators - just verify they are who they say they are -_-.
#MakeMPGHGreatAgainScammingDidn'tHappenWhenHitlerW asAround