parking problems

I do not drive very often for work. I am very fortunate in that regard. The issue is that I rarely see or check on my car. There have been a few times that my battery has died because someone has broken in or the door is ajar. It also is an issue when my car is damaged. Our landlord decided to rent out the other half of the driveway we use. They show up around 10pm every night hop out and just walk away. They don't even look back to make sure it locks. Needless to say, they aren't the most careful.