---Sometimes...
How does it emerge? Are they script-blabla on the page?
How to catch the Zombi? Are there ways to block or minimise such stuff? Or so that the browser would point you out at the source?
Can one 'manually' find them on the page?
Chrome too has click to play (http://howto.cnet.com/8301-11310_39-57536917-285/enable-click-to-play-for-chrome-plug-ins/).
"Movies with a lot of whispering" - tell me! ;D Guys who shoot them - who are they? ;)
It sounds like you should follow those instructions Frenzie linked to and get a good adblocker. It works so well I didn't know what what you were talking about the first time I read it. I honestly thought ads like that were relics of 90's and the zombies were put back in their crypt.
I don't use such an option in Chrome.
But thanks...