This isn’t PPC, it’s TTC. Trick to Click. It is a policy of Google not to allow AdWords ads that mimic computer functions or confuse or otherwise trick the user into clicking an ad that they normally wouldn’t have an interest in. This ad by reunion.com sure seems to fall into that category. I wonder how many thousands of hours in lost productivity (in aggregate) were realized after users accidentally clicked this one? This is bad for Reunion.com, bad for the user, and ultimately bad for Google if users stop trusting (and clicking on) their ads.
Edit: I took this screen grab a while back and can’t reproduce the ad. Looks like Google is doing a good job at weeding out bad ads.