There was a guy in Winston that hung around Polo Rd that LOVED the "my car is out of gas and I need to get to pick up my daughter" story. I would just say I have a canister in my trunk and would be happy to spare a gallon or two. Almost always walked away without a word.
He used to hang outside of Elizabeth's at night a lot.
We fell for it the first time we went there freshman year.
The 2nd and 11th times, no such luck for the guy. I always tried to politely say "You've asked me this before" but a lot of friends would harass and scream at him. At least he's trying.