Personally, I think it would be worth it, saftey wise, to have a cage in the car. Don't they say driving out on the road is far more dangerous than driving on the race track?? I have seen numerous car fatalities on the news where cars have been stolen, then run through a red light. Who survives?? the thieves....
Sorry, my rant, but if you've ever lost anyone on the road, because of some ignorant *** heads then in my eyes, if you've done everything you can to protect yourself, your better off. NOT just wank factor - a life saver in some cases.....