2 - With 68 servers (if i did count it right), and with an average of 3 gms per server (24h/8h of work per day), you are talking of recruiting 68x3 = 204 new gms (because the ones we have are already doing something else). Are you ready to give up yet another part of the game content to match the costs involved ? Plus i dont see that much trouble in Limsa to begin with.

3 - I believe that they said that one of the reason for that is that some people could pe pissed of when they see that you removed them from your friendlist. Still dont change the fact that toxic people can indeed continue to track you though.