Definately, I grew up in Liverpool, and this place is small potatoes to that place where the premise is nic it first then think what to do with it, so I am a tadge paranoid about opportunist thieves. Mind, in Oxford, they can't get something off, they jump up and down on your wheels and kick in anything they can't get off, their idea, if they can't have it, you are not having it in a serviceable condition.
I am particular where I lock the thing up too, somewhere nice and public, preferably in sight of a cctv camera, which isn't hard. But then my mtb is my recreation and my transport to college, so it spends a lot of time negotiating the speed humps and potholed roads.