I'd like to report how vexed I am at one particularly persistent mobile phone ring tone pop-up, which then spawns two further boxes, which you have to click in succession. It then spwans a download box for some unknown piece of peripheral crap.
And don't tell me to get a pop-up stopper or anything like that, as I'm on a university network.
I don't particularly mind pop-ups that disapear after I close them, but that one is bordering on personal harrasment in it's methods.