| I leave mine in the garage.
If some B*****d is going to nick your bike a disc lock is not going to stop em.
By leaving it in the garage I reduce the risk of carrying it on my person and possible injury in a spill, also means that there is no way I can leave it on and try to ride off.
If you feel the need to put a lock on your bike when out and about why not put a small padlock through a link in your chain. Less obvious so less chance of em seeing it to play around with it. Will stop em dead if they try to push or ride the bike away. Also less hassle to carry around. | 
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