[L3nny]

While you're never going to stop all bike theft there is a lot more the manufacturers can do and it wouldn't cost them much. Proper factory fitted alarms and trackers, places on the frame where you can put a chain through, proper immobilisers which not only stop the engine being started but also lock the brakes on or lock it in gear.
Although you can never stop the bike being lifted into an insulated van (although BMW are helping by making bikes that weigh as much as a small moon) a lot of theft is opportunists who break the weak steering lock and use another bike to push it away.
Look at the improvements made in car security over the last 30 years, on bikes it's pretty much the same, or with some manufacturers, worse.