A speeding ticket is actually a violation (less then a misdemeanor, but higher then something like a parking ticket). If you get pulled over anywhere in the country or even parts of Canada (I know NY for example shares their information with Quebec and Ontario) you might be arrested for not paying it. On the other hand if you don't drive and don't plan to do anything illegal, you are perfectly fine. Also since they don't have a specific plate there is very little chance of you getting pulled over unless you speed, run a red light etc...