I bring this suggestion after chatting on the loadstone.

Implement some sort of in-game filter checklist of who can send /tells, friend requests and party invites to help combat mainly Gil sellers. because as we can plainly see blacklisting and reporting is not working so well anymore

so we can select who we want to send us stuff like that like:
Anyone?
Friends?
Friends of friends?
No-one?
Party members?
Free company?
Linkshells?
(similar to how we filter out the chat log)

Just tick the ones you want and away you go, no more pesky Gil sellers ruining your day