I was halfway through reading a thread when this Cadbury's ad popped up from seemingly nowhere. I have tried and tried and can't for the life of me get it to close (clicked off the ad, clicked in various places on the ad, refreshed the page). So now I just can't read that thread at all 
MNHQ I respect that you have to advertise in order to fund the site but could you please stop using ads that make the site harder to use - it only puts me off the advertised company and MN itself so surely it backfires?