1) SPAMmers can be quite dim - if they were smarter many of them would be doing more useful and more profitable things. 2) I think the dynamic auto-kill seems

1) SPAMmers can be quite dim - if they were smarter many of them would be doing more useful and more profitable things. 2) I think the dynamic auto-kill seems to be working the way that it is intended to. 3) The current rather prolific idiot may be trying to probe for weaknesses, but is burning rather a lot of sockpuppet accounts and not being smart about the probes... See (1).