I SWEAR ON ALL THAT IS HOLY. this shit, stopped me in my tracks. I wish I'd done a full screen shot of it now. I think the advertisement was something for viruses. I wanted to click on it, because come on, it's more common than you think.
I seriously do the maze on that one ad every time it pops up. Even though I've completed it several times now, it still fills me with a sense of accomplishment. It always says I win a free Ipad, but it still hasn't showed up, I guess I put in the wrong address or something.