So what's your security setup where you leave your bike overnight and if you use your bike to go to work or leave it parked in the day, what do you use?
Me: My bike's parked in my garage overnight, sometimes chained to a ground anchor or just with a disc lock front and rear. It usually has a cover over it too, mainly to stop it getting dusty but also so that anyone looking in can't easily see what I've got.
Out and about, I always use a disc lock for quick stop-offs (like grabbing a bit of shopping). When I had a scooter I carried a 16mm Pragmasis chain under my seat and a cover and was pretty happy leaving it overnight but I wouldn't leave the bike overnight anywhere outside.

How about you?