Very true! I think allowing receivers to block forwards would be a good starting point because: 1. They didn't ask for it in the first place. 2. If there is e

Very true! I think allowing receivers to block forwards would be a good starting point because: 1. They didn't ask for it in the first place. 2. If there is enough adoption, senders will be discouraged from sending them, when they know their forwards are being ignored.