From a company called Glarkware, a noteworthy tool for urbanites (via the Butt):

Urban life is fraught with daily challenges. We're beset on all sides -- by thoughtless co-workers, oblivious roommates, and even regular strangers on the street -- with the flagrant flouting of the simple rules that govern mundane transactions in society. One such rule, however, is that we don't confront those who transgress against the social order -- and that's a rule Glarkware feels was made to be broken.

Now you can confront those who wrong you, in a way that won't result in your getting your ass beat up. Let the Urban Asshole cards do the talking for you, and put urban assholes in their place.

Each card is scored but not folded so you can present them as is or fold them up so that the recipient only sees "Congrats!" before they get "You're An Asshole" and the hard truth on the other side. ...

I wish I had one of these for the guy clipping his nails behind me on the MUNI last week.