Today we started blocking traffic from Tor Exit nodes. Unfortunately, apart from alternate users (trolls), we've seen an increase in bad traffic coming from Tor exit nodes. You might succeed to come through a Tor exit that we don't know of at the time of your browsing which is fine, but our registries are updated every 5 minutes.
We're sorry that it has come this far. We're all in for net neutrality, but not at the cost of the security of our lovely forums.