Much of this discussion replicates debate on how to secure a motorcycle. The bottom line is that mechanical security is degraded if the thief has time, and cover.
We had friends in Sydney who woke up in the morning to discover their locked garage open and two HD motorcycles had been physically dragged out over the top of their locked car. Must have been at least four very strong men to do that. Not only were the bikes stolen but the car needed a lot of damage repaired and a complete respray.