Dealership decals? WTH?

For the longest time, when you bought a new car, you got the dealership's logo sticker on the back of your trunk to show where you bought it.  My father hated those stick-'em logos, and would always tear it off once he got the new car home.

Then came the license plate frames.  Now I've seen the latest trend.  The dealership's decal going across the entire back window.

How in the world do you remove an entire decal from a rear window?  And who in the hell wants one of those things on the back of their new car?