Comment: I was restricted last week-this is the email response I got to my inquiry. 
Adam,
Thank you for sharing your concerns. I've had a look at your account, and to be quite honest I'm not sure of the reason for your restriction! I do know however, that your restriction doesn't have to do with other users choosing to flag your comments--even if a large number of your comments are flagged (for good reason or not), it is still up to a moderator in the end to decide what to do with them. In your case, it looks like a moderator at ADN chose to restrict your account, possibly because of the most recent comment you've had deleted, "Shit for brains is too kind." 
Other than that though, I can't speak to the exact reason an ADN moderator restricted you. However, the restriction should be lifted tomorrow, Jan. 14th!
Thanks,
Emily