I'm always astounded when, in the morning, I'm walking past the bike rack out front of the building where I work, and somebody has locked just the front wheel of their bike to the rack.
Then I go out for a walk on my lunch break, and only the wheel is there.
Our Field Team uses bikes and locks and are given a kind of procedure about them. The bikes already have had all quick-release connectors replaced with nuts and bolts (because we've had wheels and seats stolen). The Team members are given decently high-end, rather long and thick, cables with keyed padlocks. They're told about what kind of secure objects they are permitted to lock to, and how to run the cable through both wheels and the frame. There's probably more rules than just that, but I'm not on the Field Team so I don't know them all.