I'll be riding into the city more now for work purposes but when ever I park my bike in the city it's always on my mind that some kent will steal it. I have a disc lock but with all the receent threads about bikes being stolen, even with disc locks, I am now thinking of bringing a chain to padlock it to something. I've seen Peter Stevens sell bike chain locks but I've never actually seen anyone use it. I was going to just buy another disc lock to put on each wheel but all these reports/threads about how they just carry the bike is concerning. Does anyone chain their bike up?