Ways not to lock your bike

Under the bridge by Shoreditch tube station a couple of weeks back. I'd love to know whether the owner had the sense to know that if you're not going to lock your bike properly you might as well get to keep the rear wheel, or whether there is a really stupid rear wheel thief out there.

Well they stand a good chance of retaining the wheelset this way.

Mate of mine had a front wheel, and seatpost+saddle nicked. Having done the typical D-lock through rear wheel, and frame. Which TBH is enough up here. Crazy thing was. A decent spec MTB, with Fox fork etc. Was locked up like that^ one. In the same stand.

I think some people expect to just nick a wheel. So dont see the added oppertunity, in the heat of the moment.