Finally! Greeting cards that truly express the way feel and that I would gladly spend money on. They're called "Unmentionables" and are described like this on the web site:
"Are you too nice to tell jerks how you really feel? Then let these little monsters do it for you. With this handy booklet in your pocket, shabby waiters, chatty strangers and loud-cell-phone-talkers have finally met their match."