Hmmm - and opportunistic thieves.
Parked outside our accommodation in Ballarat last week, we had 5 bikes on the rack. The 4 best ones had a bike chain with combination lock threaded around them. Mine, the dodgiest, did not (the chain was too short for all 5).
One night I couldn't be bothered taking them all off the rack and putting them behind the house. Next morning, there were only 4 bikes on the rack - my unchained one was gone.
I'm just hoping that whoever nicked it, it was someone who really needed it - not just a drunk who couldn't be bothered walking home.