This always happens. As soon as I mention being on top of some particular type of spam, I discover more spam problems. This blog has just been targetted for TrackBack spam, and it was some very nasty stuff indeed. I have decided to turn TrackBack off. As I much as I found receiving TrackBack pings useful, it was a very rare occurrence, even when somebody did link to this blog. By balancing the potential harms, the small number of legitimate TrackBacks I receive does not justify the extra work I have in monitoring the blog for noxious TrackBack spam and removing it. This is unfortunate, because I do like the idea of TrackBack. If there is a solution to this problem, such as TrackBack screening, I will turn it back on.