I have long thought we needed a block feature here, but it was my understanding that it would be too difficult to make work on a blockchain (don't ask me how, I am not techie enough to understand the details of it, but someone who knows how to code said so at some point). But for safety reasons, I think it's important. There are stalkers and trolls and the like that people might need to protect themselves from; like, people who have escaped abuse, for example, might never feel safe coming to a public blockchain because their abuser might find them.