I am sure we've all experienced rather irksome incidents when a friend was less than respectful.

In my case I speak of the use of my belongings. I described in another post how I am miffed at a close friend for screwing around with everything in my brand new car. After borrowing it they returned it to me with anything and everything fiddled with. They set and reset all the features, from sound system, to information screen, to mirrors, to steering wheel, to the temperature control systems. I don't think there was a button or knob left untouched. The final disrespectful thing was they had gall to pair their phone with the car and set is as the default device.

Why? How could anyone be that disrespectful? Thoughts? Your own experiences?