My anti-theft device is my Brompton foldable bike. It folds down to a small package in 10 seconds and I take it with me anywhere I go including buses, trains, e

My anti-theft device is my Brompton foldable bike. It folds down to a small package in 10 seconds and I take it with me anywhere I go including buses, trains, etc. It came with a nice black zipper cover. One cannot see that there is a bike inside. This helps with some pesky ticket masters on trains.