Even if the VPN were locked down and no trace of your IP were leaking, this doesn't mean you can commit nefarious acts online without getting found out. There are log files on every server. The amount of time logs are kept varies. With enough resources and legal action, log files from VPNs could be turned over to authorities. Once they see your real IP, they simply subpoena your ISP and will find out who you are. Realize that it can be more complicated than the scenario I use above, but my example is to simply help you understand that you're not truly hidden online.
A good VPN doesn't keep logfiles, so there's nothing to subpoena.
Actually, as a matter of fact they do, most of them at the least, they just don't reveal such information to their users.
Aside from technical possibilities, theymos values user's privacy. That alone is a reason not to do this. And in the end I don't expect it'll stop spam anyway, it's the core business for spammers.
I meant that to be done only so that banned users cannot come back but theymos would not want to do such, so what else can one do?
Followed this guy because I thought that I found a pattern (like they signed up 1 account/hour) but it turns out that there is no pattern. Nuked more than 2 dozen of them already.
Sadly this guy's legion of accounts doesn't end up here, LoyceV mentioned that he had reported around 100 users related to Alex promotion , but there is a possibility of Alex promotions and hypebtc to be interconnected, as they both follow some what the same pattern.