Sometimes, I think I need one of these signs in my house, although I would delete the words, "on walls" so that the sign simply says, "Please donot spit."
Last week my kids asked me to buy them slurpees, so being a nice mom, I did. We went home. I started to put away the groceries and check my email when I hear some fighting going on in the family room, in the carpeted family room. I went into the family room to discover that my kids had decided the slurpees were great for spitting at each other. Sorry 7/11 but it will be a very long time before I ever buy slurpees again.