Yes, the email login, if possible at all to use for your forum, really helps at this moment. It may not be appropriate for any forum though.
Thank you for letting us know.
Also, if your forum is currently targeted by Tor addresses (quite a number of forums are, though not all) you may want to try this:
Tor Blocker, as a short term solution against them. Please note that Tor users can very well be legitimate, innocent users... unfortunately at this moment the malicious users are using it heavily, and if you want to identify and block them for now, this mod is useful.
We're working on a few more possibilities and we'll come back on this.