Yet another reason to use Flashblock on Firefox (flashblock.mozdev.org). This thing utterly fails with Flashblock installed. In fact because of the way it does the div layer/iFrame/CSS/whatever trickery that hides the security stuff) you can't event stupid your way into this vulnerability with FB installed.

Actually you're better off just telling people to turn on their cameras and providing instructions. The stupid ones will just do it in order to play your "bejeweled" knock-off.