Is there a setting for banning a troublesome user so that they cannot re-register after deleting them?
How to ban a user from registration
Oct 5, 2015 - 2:34 pm
There is a ban plugin, but I haven't personally used it
Oct 5, 2015 - 3:05 pm
As to stopping registration completely, that might come under the realms of a WP plugin, although haven't used any for that purpose myself..