Endogene said:
just install "flashblock" if you don't like it, here i'll even make it easy for you
http://flashblock.mozdev.org/
this proposition is just stupid
That's right, you tell the owners how to run their site! Annoying others is so hard to NOT do, so everyone else should just adapt to the actions of a select few and install add-ons to their browsers or disable flash playback!
Any flash that plays audio or requires an overly large download WITHOUT user intervention should be pulled under this rule too. Also, to help enforce the "invisible" rule you could see if you can prevent flash files with the width or height of 20px or less being allowed (as anything within that size could be accomplished with gifs if animation was needed!). Simply an idea.