I have accepted that if someone wants your bike, they are going to get it. Even u locks with two locking ends are pretty easy with a portable angle grinder. I completely HATE the stress of wondering if my bike will be there when I return. But the stress is a lot less when it's only my $200 beater folder. If that got taken, I'd be pissed and probably have to put some real effort into finding another cheaper decent folder beater, but I'd shrug it off pretty quickly as the cost of living around other people. So I can lock it up and not worry. If you've got a nice bike you don't lock it up, anywhere, unless you're willing to lose it. My Bike Friday sleeps in the house, not the garage.