I'm trying click to play instead of Flashblock (which I've used for years). It seems to work nicely, but I preferred the way Flashblock shows its placeholder because it draws a little less attention to itself. See attachments. I think it would be great if the striped background would be mostly-transparent.

And the equivalent Flashblock screenshot.

If there are a plugin content on the place, the background will not be transparent. I think that the no-transparented background is highlighted as "This is a plugin content" for user. It's be useful for confirming to permit the content. (doorhanger notification can "this page has some plugin content" but it can not more detail about it.)

I'm not saying it should be fully-transparent. I think it would look better if it was partly transparent, like say 50%.