I don't take much notice of the ads here, but one for FXGM FX Global Markets that I've just been bombarded with flashes so harshly and so quickly I would imagine it could be positively dangerous to people with epilepsy. Not good.
It's not quite the same but the Blackberry advert is also really annoying as it seems to jump onto the page whenever the cursor is situated on the right hand side of the screen.
It must be targeted advertising and they don't think I'm a suitable customer, because I haven't seen this. I just get those "Rebecca is 3 miles away" ads (although I've not seen her today) and that Blackberry one that kept taking over my screen if my cursor went near it