Both. But at this point I have the upper hand over the spammers in the sense that most spam is killed by software.

Is it a bayesian filter on the linked page?

I have a weakness for submitting wild-ass guesses, so my guess is that after a user account has X number of submissions killed, they autokill after N number of flaggings. I would also guess that as X increases, N decreases.

No, much less sophisticated.

heh. mouse pointer was on hand and I thought you said: "I have the upper nand over the spammers" ;-)

Adding to the above question:

1. Do you use the flag feature to decide whats "dead"?

Yes, both editors and software use it.