I could have easily walked away with a free bike here. All I would have needed to do is walk up to the bike, remove the seat by undoing the quick release. move the bike forward slightly so the d-lock is no longer on the frame and then put the seat post back in. The failing here is due to putting the lock on part of the frame that is not enclosed. A common thing on rear suspension bikes. Notice the second lock also just hanging from the handle bars. This bike could quite easily be secure but instead would be an easy take with no tools required.