99.9% of random alphanumeric user names such as gfhijk56 will probably be spammers, and they will definitely be spammers if they show their location as 1 or 11.
I think that if we got rid of them when they first appear it would avoid them posting and avoid us having to delete their posts.
If they can’t even post their first post they’ll lose interest in trying, unlike the existing never-dead who keep coming back after being banned.