The best protection I have seen is a brake pedal lock. It slides up under the brake pedal and you set the brake with you foot and slide the locking mechanism down to the pedal and lock it. The special steel of the lock cannot be hacksawed and the toughest metal on the car is the brake pedal - apparently impossible to cut in a short period of time. They may start it - but unless they tow it - it ain't going to move. The club is indeed a farce - more for a "feeling good" than being useful. 15 seconds with a good hacksaw and you have a stolen vehicle. Alarms don't work - people hear them going off accidently all the time and are starting to ignore them in parking lots etc. A good starter-ignition defeat with the brake lock I mentioned - I think is the best way to go for now.
Just my opinion.