there's no great way to keep people from breaking in a stealing it. i just take it down and hide it every time i park - but you can't be lazy about it. you could put it in the glove compartment and lock it, or stick it in the trunk.. but thieves can still get to it. i also don't leave it in the car when i'm at home since i live at an apartment without a garage at college. basically, just take every precaution.