Without weighing in on any of the political debate...
To my knowledge, Janet Jackson was not banned from the Grammys; she simply chose not to participate after the furor over the Superbowl incident. (IMHO, a wise move.) Justin Timberlake seems to have decided to continue with his scheduled appearance.
Also, the time delay for the Grammys (and whatever else will be on ABC, and the SAG awards on TNT) will be 5 minutes, not 10 seconds. That should prove adequate for editing out anything deemed inappropriate by the network's Standards and Ethics department.
