Ways not to lock your bike

Actually did this outside Morrisons in Peckham. Realised just as I began to walk off.
It looked correctly locked up but if you look close enough it's not even around the bloody metal. I don't think anyone would noticed anyway, but still. Would not enjoy a loss and the journey back to Islington.

Felt like a right plum.
I did the very same thing last week, locked bike at train station, went off to work.... Come back a good 9 hours later, bike has been knocked over and I realise it's not locked to anything at all. Oops. Probably not worth stealing tbh...