Grammar Cop: Tae Kwan, Doh

Complaint: Failure to use an apostrophe in the construction of plural possessive, a misdemeanor; Usage of an apostrophe in a plural noun, a misdemeanor; Rendering errors permanent by affixing them to a sign; Placing sign on a sidewalk so as to expose innocent passers-by to grammatical dysfunction.
Defendant: International Martial Arts Center.
Report: Incident occurred during a routine patrol between headquarters and a place that was not headquarters. Officer covertly took the incriminating photograph so as not to incur the wrath of martial artists who always want to practice that stuff on people.
Fine: $173 and two points deducted from the positive self-image of the guilty party.