Deckorum
1. 	dignified propriety of behavior, speech, dress, etc with regard to the act of top decking.
2. 	the quality or state of being deckorous; orderliness; regularity; efficiency; justice; stealth.
I heard some young ruffian top decked that nice irish theme pub, even though their prices were reasonable and the beer tasty.

Such an act violates deckorum.