What is the deal with the "stop stealing" on the gallery?

I do a lot of downloading from the Gallery and remodel the houses -- sometimes converting a bedroom into a home office or adding a pool to the backyard (sometimes I'll take a house that's on a 30x20 lot and put it on a 30x30 or 40x30 so I can have a larger yard) or I'll add a basement for extra space without having to add onto the top of the house. I've never reuploaded one of my remodeling jobs though -- they're solely for my own gameplay.