maybe you didn't see how this was discussed and how it would be implemented? if a client implements a blocking feature, it will be essentially a filter. for example. if i block you, i wouldn't see your comments on my notes while using the client that implemented the feature. they'll still exist, it's public data, and you can comment all you want, but as long as i continue to use that client, i'd never see them. to me, the user, it's a block. that's really the only type of blocking feature that can exist on an open network :)