Thanks, I saw that link. I did also mention watched words to the admins, but the spammers are getting creative in all the ways spammers do using accented vowels, unicode black/circled numbers and such.
The community is company-related and no-one should be signing up from the time zone I would like to block (which isn’t the one I listed above as exemplar), and my goal would be mainly to flag them for manual review, not block them 100% all the time absolutely no-questions-asked goes to /dev/null.
I realize IPs can be spoofed and VPN’d so I didn’t suggest that. One thing I do know by reviewing the spam accounts is that at least at the moment they aren’t thinking to obfuscate their time zone, and where they are at does not overlap with the footprit of legitimae users of the site.