Wiki spam

I suppose wiki spam is inevitable. I've set up the wiki part of this site to be fairly open to changes to encourage readers and visitors to interact, but now for the second time a spammer has dropped a bunch of links to some Chinese websites onto the pages (Recent Changes).

It's not hard for me to roll them back, but clearly they won't stop, so soon I'll have to escalate and only allow registered users to make changes, hampering the openness of the site.

I suppose this blog needs a "dark side" or "tragedy of the commons" category now too.