How to block VPN

Where is he posting stuff. On the site or DM or profile field?

He is using DM

Do you have a content delivery network or firewall type of system in place, such as Akamai, which would allow you to "fingerprint" the users that visit your site? These types of mechanisms are what's typically used to identify patterns of users and block them before accessing your website.

Otherwise, without looking through your recently registered users list perpetually or attempting to block a whole range of IP addresses, or adding to 'word filter counts' for terms this person regularly uses, you're going to definitely struggle.

You may also, for a period of time, be forced to enable moderating all comments posted or verifying all new users.

If you're outright deleting this user's account each time, consider setting it as moderated instead to prevent new sign-ups with the same e-mail address.

Mhh.. we built something for a customer to intercept unwanted DMs via the moderation process...not sure it is default ...let me check that with the team

Thank you i guessed as much. He isn't posting on the forum so we are just monitoring the membership list and audit log for new members and we can tell by the pattern and names he chooses that its the same person so are blocking before he has chance to do anything. The first 3 times he got to DM loads of women inappropriately but we are disapproving him before he can do anything now but i don't know how long we can keep on just watching the site.  He signs up with a different email address and username each time so it's hard to do anything preventative and they are all gmail. \Hopefully if we keep blocking him he might get bored and move on. I think we may need to switch off DM if we can't stop him. Thanks anyway. I will talk to our devs about Akamai

Just talked to my team. It is not standard. Abuse automations do not monitor DMs. We can have an opinion about it but it won't help much. I would look for a solution in 2 directions:
1: Expand the Abuse automation coverage to DM's OR
2: Build an automation to automoderate all DM's only

Thank you