Comment 2 for bug 974480

I gotta agree with Sebastien; this seems like a horrible idea. There are apps that will *never* directly support Unity's notification area, but work fine with whitelisting. I regularly use at least three that I had to whitelist manually.

The only reason to remove the option of whitelisting would be to force technical users to decide to either stop using those programs (many of which need a working tray icon to be useful) or stop using Unity. If you want people to have a valid reason (freedom of choice in applications) to bash Unity in favor of every other desktop available, go for it.