I just remembered that on my last trip the same thing happened when a "taxi" pulled up and asked if we needed a ride. We were walking but getting tired, so I thought about it, then peeked around the back of the car to check the plate....so he immediately starts getting all worked up about why am I checking the plate, blah blah blah...I just said no thanks, we are just going to walk. He was not happy but whatever. That is the ONLY time I can ever recall having any issue regarding something like that.