[jiggy2011]

Well, a lot of people browse facebook at work when they should probably technically be doing something else.

Auto playing video ads would definitely be a detriment to that.

One of my most memorable "oh shit" moments was being in the office, googling for something programming related and landing on someones hacked blog. I got 301 redirected to some porn site with autoplaying live jasmin popups.

[sigzero]

Maybe not. My firewall at work prevents a lot of video from playing.