could you consider this idea to combat rmt tells
only way to send tells when under certen conditions

1 if you know them for example if your in the same FC or LS as them or have them on your friends list.

2 you are in a party with them.

3 you have a party finder up.

If you could adjust tells to these set conditions you could not only do a big blow to their so called business it could start phaseing them out of the game.