Disable comments for a user?

Is there a way I could ban a registered user from posting comments, thus converting them to a read-only mode temporarily? Ideally I'd like this to be a set-it-and-forget-it solution (ban user for 2 days, then they are unbanned automatically 2 days later).

I have comments open to registered users only, sitewide.

I have searched thoroughly for a plugin to help me achieve this, but failed to find anything.