I work at a place that runs a fairly (locally) popular website. We sometimes get orders for ads from a company who just gave us one of these to run. I gather that the behavior in question is intermittent, so it was just dumb luck that it happened to me, so that I realized WTF was going on and killed it.
So they aren't screening this stuff, huh? That means I have to? Shit. I don't know how to screen for this. I hate Flash. I hated it before, but now I really fucking hate Flash.