I'm sure that's what Steve means - for the wallpaper to fall off the wall.
It won't matter if the ceiling moulding is holding down the edges of the paper. At best, the edges 'might' stay in place but the rest of the paper will eventually fall.
Check out my response to a previous post. Painting over wallpaper. It was just the other day ...
My best to ya and hope this helps.
© 2016 Renovate Your World LLC