Years ago nobody would have even thought twice about helping someone like this. It would have been automatic. Today, many people seem to want to crucify the "fuel buyer" without ever even knowing the full story. I would hope that if someone "borrowed/bought" fuel out of my plane, I would be glad to have been able to help them out. The fact that he paid double for fuel tells me that he felt a little bad for what he thought he had to do in his circumstance, whatever it was. He could have just stolen the fuel after all. There was a time when we looked to help out our fellow man. Not so much anymore, I guess. When my wife and I were coming home from the Bahama's in our Cherokee, on our second to last leg, we had much stronger than forecast headwinds, and I didn't think i could get to my intended final fuel stop. I made the decision to stop short at an airport that had self serve fuel in Northeast Louisiana. It was late on a Sunday afternoon, the weekend after Thanksgiving. It had been a long and trip, we were both a tired, and we were trying to get home before a massive cold front arrived in Kansas. The problem was that when we landed and taxied to the pump, there was a note on the cardtrol that said that the credit card reader was not working, and only the local smart card reader was allowing for fuel to be dispensed. I didn't know what to do. About that time, a local came up to confirm that the credit card reader did not work. I asked him if he had a smart card. He informed me that he did. I asked if I could buy a few gallons of gas to get me to the next airport, however, all I had to pay him with was a check. He declined. My wife and I were not angry at him, just very disappointed and very very sad. I lost a lot of faith in humanity that day. He was so worried that a 30 dollar check was going to bounce I guess, and to him, helping a fellow pilot out in his time of need was just not worth the risk. When all we can think about is ourselves, we all die a little. In today's world, I guess the Golden Rule no longer applies.