Have You Ever Filled Your Water Cup With Soda?

The other day I grabbed a water cup from a restaurant and wondered how many people actually 'cheat'  and fill it up with soda.

This past April a teenager actually got busted by McDonald's for doing this.

I use 'water' cups all the time and drink a bunch of water and actually do not want the soda's.

If someone you know did this would you call them out?  And, is it a really a big deal?

Do you consider it stealing?