It certainly is cost effective to have block and acceptance tab for nuisance messages. It would save cyber reality a lot of time and there would be mercy in his/her working hours to close some of the discussions.
Be moral, be ethical and live life to the maximum.
I rather do prefer an Open Real World. We are adult enough surely. I do hate Forums like Elite:Dangerous in which people abuse posts and report for kicks by baiting. This is a nice forum really.