What gets me about these thefts that in nearly all cases they are are not random. Its clear that:
know where the bikes are
know what expensive bikes are
when the bikes will be in the garage
come equipped to take them so they have a van or car parked nearby
spend sometime around the premises waiting to see its safe to go in
have a buyer for the bike
Conclusion must be they get the information somewhere or somehow? There is a security leak. You can put your self in the shoes of the thief and ask yourself how would you do it?
Is our address connected to our bike – LBS, Forums, MBC?
Is someone looking at your movements?
Do you ride the bike from home?
Someone follow you?
Someone in your street see you ride the bike?