I finally did it... disabled tells with busy status. RMT unbearably bad.

[SCUBA_Instr]

I played EVE online for a few years. One of the best features for dealing with RMT:
Right click, report RMT.
Can we get something like this in XIV?

Hi Risvertasashi,
Thank you for mentioning this. Last July, CCP Games made the news in CIO Magazine,
by unleashing Unholy Rage
on over 6200 paying bot accounts.

...the mass purge of these accounts drastically freed up CPU resources for the game's legitimate players,...