An unusual form of comment spam

My post yesterday about older games seems to have attracted some attention – but in this case, of the negative kind. This morning I logged on to find a bunch of new comments – except they all looked somehow… odd. Turns out they were all from throw-away blogs (fake blogs set up to increase search engine rankings) that had done a “trackback” to my article. Some of them quoted just a bit of it (to make it relevant in Google’s eyes, I suppose) and one even went so far as to try and look like a legitimate link – except they used the wrong name! (They said “I’d have to agree with this post by Kevin B.”)

Very strange – and this is the first time I’ve seen stuff like this show up in the comments. Has anyone else ever seen such comment spam? Is this a new phenominon, or is it just old stuff that I have been lucky enough to avoid thus far?