I understand where you're coming from, worry not. Honestly if there was not both a character limit AND a limit on how many tags a community can possess, I'm sure we'd have a couple of tags that would be near endless with how so many people account hop to avoid their antics.

But its true after a certain point you have to break up the identities. So in your case you might have to do something like group together the top three to five known aliases (and I mean they're know via popularity and/or amount of clients on said alias), and then slap a 'previously known as' on there as well.

All in all, this just solidifies that its damn annoying when you have account hoppers! Makes you pull your hair out. :