Inspired by another thread. I'm thinking most of us have been burned one time or another! I no longer lend my friends things (to be fair nobody has asked since adulthood!) but as a teen I had one friend borrow a bunch of books, only to return about a third of them (she came from a kleptomanic family - her mum stole from my mum, her brother from my brother - it would have been funny if not so disturbing!) and another kept hold of my DVD of 'The Wedding Planner' despite my repeatedly asking for it back.
What about you guys?