I don't mind a short RB at the end of a transmission, especially when there's a lot of traffic. I think it makes sense. I do use it while I'm on 11m AM. I would never use it on the Ham bands just because they (we) frown on it, but used in the proper manner I don't know why it's not accepted.
73
It would have to be long long distance to where you can't hear their carrier unkey