Car break in's

Our car has been broken into twice within the last month and 1/2. The first time they stole a bag with some toys they will get nothing for, and this time they didn't take anything. We leave the car as bare as possible, but that does not seem to deter them. I have done some research and found this is happening quite often lately. We are new to the neighborhood, and never had this problem in our old neighborhood. Is anyone else experiencing this? Can we all maybe get a petition going so we can have more police presence over night in these neighborhoods?