Not all of them. But another thread reminded me of something that happened to me when I was young and naïve (pretty much c+p from thread - those who read both aren't having déjà vu!):
In my early twenties I got chatting to and then bought a(n assumed) homeless man a drink in a pub.
My friend took a shine to him and invited him back to his flag where the three of us had an impromptu party - drink, drugs etc. he partook in both.
Woke up on the sofa the next day and our new friend had gone. So had all excess alcohol, plastic bags which had trace amounts of drugs in etc. The flat was actually comparatively tidy.
Went home, two days later went to withdraw some money from the cash point - card gone. Went bank - account empty.
The police had CCTV of him at the cash point down the road that morning, but because he must have seen my PIN when I bought him the drink there was no official crime committed according to the bank, I should have been more careful. Which I agree with.
My passcode on my phone was the same as my card at the time (I knooow) so I've always assumed he saw/kind of saw my PIN and then when I yelled my passcode to my friend who was wanting to change a song he had a lightbulb moment.
People are arseholes sometimes despite your best intentions.
Discuss.