I think global chat is more a form of troll entertainment for people. To a minor degree it is useful for recruiting. To be honest, I also feel the devs have certain individuals they tag as repeat offenders and monitor these people closely. I also feel there are a lot of users who would like to use global chat but feel intimidated by all the ban hearsay and also trolls who love to take screen shots of your global chat out of context and try to use it against you. Discord is much more useful.