I have been getting lots of spam messages from people linking to our site using pingbacks and trackbacks. I have now disabled them by default on new posts, and have updated the status on some of the older posts that seem to be favourites of the spammers.
You can always override this disabling when you post if you have a really good reason to do so – I can’t think of one, but may be missing a trick somewhere.
If none of this makes any sense, please feel free to ignore it.