Like button?

this is a great idea, given past experience of being accused of creating tags about another user when hadn't...

It's an idea that about five gazillion people have had before, but it currently can't be implemented:

Unfortunately the forum software isn't being worked on... at all. vBulletin created a buggy next version, and this version has stopped all development. I'm looking at other vendors to switch to, and this has made me put the re-design on the back-burner too.

As it stands, with the core product not supporting removing anonymous tags and no work being done to change that, I can't do it. Not that it matters long term, as any alternative product is unlikely to even support tags.