Not really. I've never had one of mine stolen, despite usually using a fairly crappy lock. The trick is to have a bike which stands out. If you can recognize y

Not really. I've never had one of mine stolen, despite usually using a fairly crappy lock. The trick is to have a bike which stands out. If you can recognize your individual bike from across the street, people won't steal it. Bonus points if it looks crappy despite being well-maintained. Beyond that it is mainly a matter of parking in bike garages with cameras where possible, and using a chain lock to fix it to an immovable object otherwise.