Option to delete blocks from profile. I'd assume this would also delete the block from whatever channels it's connected to which some might say goes against the nature of Are.na. However, if a user wanted to retain ownership of the content being deleted, they could just download the content/upload the original source themselves on their own profiles. Another method would be to create a new instance of that block every time it is connected to a channel by a user that doesn't already have that block. In any case, I think the option to delete blocks from one's own profile is particularly necessary due to the limited amount of blocks that free users have. In a hypothetical situation, if a free user has met the block limit and every block is connected to a channel they don't own, then the user can no longer upload anymore content because they're not able to delete blocks from their profile.