@pichlo
tmo has (since years) a plugin matching ip+email/username to block unwanted spam comparing those records with spotted ones on common blacklists.

It is not enough.

Before apply the (dumb) ip blacklist we reached a level of spam that it was impossible to be managed by any number of human moderators.
That's why we activated this block.

How this could happen? - How many usernames or emails can use a single ip address to register new accounts?

Why they are targeting us?
Probably because our community is big enough to be interesting and enough complicated to (statistically talking) hide some flaw.
The same offending ips often try any kind of approach to make damages. (code injection, common vulnerabilities...)


Are there better solutions? Probably yes, but nothing immediately usable.

Why our techstaff does not work every day, 24h a day on this issue to create a better solution satisfying tor users while blocking all spam?
Because when you talk about techstaff you are talking about just a few guys with a real life very busy, that are facing everyday with the complexity of the servers of this community trying to do their best during their limited free time.

This is the situation.

To be clear - effective solution in a limited time to obtain the best protection.

Suggestions and help are welcome.