So I've had several hundred trackback spams in the last few days, all originating from blogger sites that have been created in the past few weeks, and of course have their reporting flag removed.
I would report them and complain to blogger, but I think we all know how responsive their customer service has been.
I'm using haloscan, which HAS a spam filter, but like any filter theres only so much it can do. Maybe there are more solutions in the fhaloscan forums, but for now its manual deletion.
Oh and worse, theres no way in haloscan to bulk delete these things, to its an individual click each time. Oy.