I'd also like to add perhaps a report feature when you right click the name of the spammer that messages you. I get gil sellers ads all the time and it becomes quiet annoying for my enjoyment of the game. I would think it'd be in the best interest of the community to be able to report them for such soliciting and to do so quickly and easily, perhaps even with a few auto response reasons for why you are reporting them, like "Solicitation" or "Harassment".

I don't mind so much the tells from people not on a friends list and Linkshell or Free Company, so long as it's not these gil farmers trying to sell me their money/services.