Can we have an in-game Chat Filter?

[Canadane]

RMT is a COMPLETELY player created problem

Stop buying gil and carries.
No demand, no need for supply.

But continue to blame SE for not taking into consideration how greedy, impatient, and entitled the playerbase is.

While you are correct, it's on SE to start handing out bans to buyers so there's no tolerance for dirty money.
As it is, it appears that buyers are very lightly punished, if at all, based on the ban reports they put out.