what if i am not in the wrong? .. for example ... I am used with the SI units and a straight conversion gives 60mph to 100 kph = 104kph ... given certain circumstances I could get pulled over.... even worse not seeing a speed sign and in between speed changes would burn me till tomorrow and back with the fine.
and add to this if it happens on a friday night/weekend ... then what?
Ask yourself this simple question: "Do I plan on coming back to the US (or that particular state) again?" If the answer is no, throw it away and forget it. If the answer is yes, pay it (or go to court if possible).