Please add a notice to the dns-blocked page (preferably with a link to this post) that the block was enforced by Sonic.net. At least one of your blacklists has a pretty high false-positive rate and I spent a good hour trying to figure out what was blocking random sites so I could disable it.
Looks like the shell server, bolt.sonic.net, is not using DNSSEC (per
http://test.dnssec-or-not.org/. Is that intentional?