Originally Posted by
spare_wheel
you either do not live in a high theft area and/or are lucky. u-locks are a mild theft deterrent at best.
Some ulocks are tougher to defeat when several security layers are mixed together though
http://www.xenasecurity.com/product/.../main/showall/
But alarms can be disabled pretty fast and people don't care much about an alarm ringing. At least, if the bicycle's owner is not far from the bike, it could be a good way to know when the average joe the thief is working...