Question: how to stop someone from vandalizing your car?
Answer: Use your garage. If you have a garage, use it! ... 
Light it up. If a garage isn't an option, try to park close to your house in a well-lit location. ... 
The watcher on the wall. ... 
Sound the alarm. ... 
Remove temptation. ... 
Record the evidence. ... 
Don't leave car windows open.