I Could Find Uses for These

[talon]

http://www.jailbreaktoys.com/Like_Dislike_Stamps_p/stlik00.htm

I could find uses for these, especially when eating out. Of course, stamps with just a smiley or frowny face would work as well, or Vistaprint cards that can be left with tips.

Really, anything that signals approval or disapproval.

I'd probably need twice as many of the "like" stamps/cards/stickers because I like a whole lot more than I don't like.