In my country is a crime to harm animals.. or to walk naked on the streets.. or to sell guns... etc. We could go on like this forever.
We must make a separation in what regards "crimes" and "fraudulent" ingame and IRL..
There are:
1. IRL crimes which are outlawed by IRL laws and police or similar IRL organisms enforce the laws.
2. ingame "crimes" which are outlawed by EULA and EULA is enforced by MA.
Is normally that ingame activities should not be a form of IRL crimes and those cases are also enforced by EULA (say sexual harassment, money laundring through PEDs exchange, etcetcetc).
But ingame we don't have a legislative system similar to IRL. From the roleplaying point of view, we talk about a pioneering universe, with barely established human structures, with scarced elements of government and such. Is somehow similar to Wild West period.
Therefore, we must keep in mind that exists a limit between VR and IRL and from this point of view, scamming is legitimate. Same is reselling, same is market manipulation, same is resources/products monopoly, etc. IT IS part of roleplaying. And is comunity's duty to react to such, in the limits offered by the universe. From this point of view, wanda's efforts, as example, with "scammer alert" and other similar initiatives are wellcame. Maybe in future we will have the posibility of establishing ingame governing structures, which to handle such cases. But it is not MA's duty to counter scammers. MA must do their best into insuring us safe trade mechanisms (and they did), even issue warnings to tell us about scamming, but they can't enforce measures against them. Scamming is inside game mechanism, as opposed to, for example, third-party software known as "hunting bot" which is illegal for the system and must be countered on sight.
I hope I made my point clear.