I've been chipping away at the boys on this one. I think that if we impose a character limit in the tag line, it would be difficult to use them as spam, but within that character limit, one should be able to makes as many tags as possible. If tags exist, there isn't really a great reason to limit them to one. I see all or nothing, and everything else is a kind of Obama '09 stimulus package, a nod to the fact that its a good idea, but close to useless in practice.
I couldn't agree with you more! It has always puzzled me why the OP is only allowed one tag per post - I would absolutely love it if that number were increased, even if it were only to three or five... unlimited seems almost too good to be true.I think that if we impose a character limit in the tag line, it would be difficult to use them as spam, but within that character limit, one should be able to makes as many tags as possible. If tags exist, there isn't really a great reason to limit them to one.
As it is now, every person gets to add one tag, presuming they've earned the right to tag. The difficulty with tags is that the taxonomy becomes a bear. At some point #writing and #writebetterdammit need to merge (or at least overlap) in order to make the content parseable. I have no solution for that as of yet. The rest of it seems pretty elemental to me - I mean, Twitter lets you follow tags, and Twitter lets you follow people. They've got a bit more of a userbase.