Just occured to me:
How simple/EZ would it be to just remove the front wheel off of your bikes when not in use to help prevent this? Heck most of the time they are on a stand and won't be rode but for weekends anyway. How many bad guys would take the time to install the wheel/parts IF they could find them?
Locks/cables can be cut. Dealing with a bike with no front wheel would be a PITA.