Keeping information under wraps just encourages more security theater, like people believing that locks actually work to deter skilled attackers, whatsoever. They really don't. They deter casual attackers at best.
Better locks also increase the time to break them. More time == more chances to be disturbed and have to go away and also an incentive to move on to the next house, bike, etc. In the case of bicycles I also advice to lock them close to much better bikes with similar locks: chances are that the thief will invest those 30 seconds to break the lock of the better looking bike.
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