A handful of people have put me on ignore because I said that Litecoin sucks.
That and your SDICE agenda...
...and your general attitude sometimes.
Anyways, scammer gateways are a possibility, just like scammer Bitcoin exchanges. You however can choose to trust individual gateways and they can also trust each other if they want to.
Gateways would already fit into existing legislation concerning E-Money issuers, so it should be possible to actually open them up right now with existing laws. Something that is not too sure/safe with Bitcoin exchanges...