Ok heres what we know about this new thing: Friend selling?
Turns out that if you friend someone it removes the restriction of tells by low level players.
allowing the new player the ability to repeatedly spam the player with messages again

method to fix it: New player under 20 hours since creation / and certain level can not send friend invites.

my extremest methods of perma fixing all Gil Selling
1: any new players whom you as a player have no interacted with on your part can not interact with you.
as in. if a new player in Ul dah, tries to message a player in gridania without having traveled there first and being under the time and level
restrictions will be UNABLE TO MESSAGE SAID PLAYER

My Tits end Fudge all low level players resolve would be:
Options menu: prevent all messages, interactions with players under level XX

Freaking BOOM DONE. if i want to interact with a low level then it should nul/void

2 new players should be able to communicate