I have used the block feature, but it is kind of inconvenient. Being able to give tags would be an interesting feature.
What about a "grouping" function or a "list" or as you say a "label"? (whatever you like to call it) For example, this could manifest itself as a project group and everyone you want to tag could be done using this label. The other people wouldn't have to know they're on such a list or grouping. Mailing lists in email programs work this way.
Not to muddle up the idea, but you could serve both functions with this idea if implemented this way.
(post is archived)