yay or nay: wall decals

and now,

for one that inspires many a heated discussion among designers:

The Wall Decal.

(insert scary music :)

It's a sunny, summer wednesday - why not open up that can of worms?!

Clients want and use these ALL the time.

Most of my designers cronies despise them.

I think that they can be extremely tacky

or quite interesting,

depending on the application...

source 1 2 

That last one may change a few minds :)

 What do YOU think-

 a yay or a nay?