Just to clarify, blocking a user will stop them from interacting with you (commenting on your posts or sending a message). Perhaps we should make it even more restrictive.
I think we need to have several platform moderators who have delete permission to take care of spammers and abusers. I have given this permission to @benmckechnie now. I would like to have few moderators to help with such issues in the future.
Thanks for reporting @quang @benmckechnie