I'm glad this thread is resurrected.
A few months ago I bought my teenaged son a new mobile phone. About a week later he'd gone on one of his usual long bike rides, and had managed to lose his phone in Exmouth town centre. As my son hadn't put a password on the phone anyone could use it, which turned out to be a good thing as the young man who found my son's phone was able to access my son's Facebook account to say that the phone had been found. My son arranged to take the train back to Exmouth the next day and meet the good samaritan so he could get his phone back. I try to be a positive person and have faith in humanity, but the kindness of this stranger still struck a chord.