I get how some people don't like the idea because their theory is "OMG THIS CAN BE ABUSED AND YOU CAN JUST RECRUIT NOOBS AND NOT LET THEM TALK AND THEN THEY ARE YOUR SLAVES," but I don't think you're considering that they have the option of leaving or just not joining your guild
I also suggested that this permission be ticked by default (or worded as "disable guild chat" and unticked), so I just feel like a guild leader should be able to control their guild
I'm fine just not recruiting people who are spammy and crazy, but I feel like this would be cool and might help guilds function during towers and GSTs