They should remove all chat capabilities from graal period.  

"guild leaders shouldn't be able to disable guild chat for certain members of their guild, but I should be able to ignore the guild chat of my guild"

that self-entitlement though
try joining a guild without spammers if that's your attitude  

Posted by Thallen

"
try joining a guild without spammers if that's your attitude

It's funny how almost all of your comments contradict your own statements. I should say the same thing to you since you're also proposing an idea to reduce guild spam.