May be a bad (hacker) bot that goes around everything could?
Is there a bad SE bot out there that base the SERP's on time spent on a page / site as a SERP ranking factor?
I have seen BOTS stay nearly permanently on some forums.
But does any (bad or not) company have the resources to supply the required number of Bots?
This shoud be of theoretical and no practical value in 2007.