My younger brothers sold my '86 GT Performer for $20 while I was away at college. I consider that one theft for sure.
Almost had my Specialized stolen right out of my garage here at home (I was in grad school at the time so I'm counting it). Thankfully my former neighbor saw the kids trying to ride it along with my wife's bike out of the garage and her husband ran across the street and yanked the kid right off the bike and held him until the police showed up a few minutes later.