Tom Tom has a feature that allows you to change the voices. Even stoners can't ignore Mr. T yelling "Take a right fool!" or "Enough jibba jabba, turn left!"
Doesn't matter what the states do at this point. CParso already touched on this. You can have a small amount and/or a perscription with it. If the Feds are the ones who come bust your door in or arrest you. (Hypothetical, in reality I don't think they would hunt down a small time user unless they want to go up the chain to the suppliers.) No perscription will get you off the hook. I'm not sure if there is a limit in the federal statutes but if there is and you have more, you're prosecuted under federal law. I think then your best bet (if you only had a little on you) would be to request a trial by jury to gain sympathy but would you really want to pay a ton of money for a lawyer to try and get you off? Anyway, back to the topic, never done it, but as long as you are not placing anyone else in danger by doing it, I don't have a problem with it. Same as alcohol, you have too much, that's your choice, but don't make someone else pay (car wrecks etc.) because you wanted to get wasted.
Obama has not supported legalization, but he has supported states rights to allow medical use. The times, they are a changin'. Medical Marijuana Policy May Change Under Obama
My brother said he recently saw a special on TV about marijuana, Marijuana Inc. http://www.cnbc.com/id/28281668/ Apparently, there are cities in California thats whole economy is driven by marijuana.
It seems to me that marijuana should be legalized. There are far bigger fish to fry in law enforcement. I don't use it, but have no problem with others doing as they choose.