Windows are the most common, but hoodlums will often see it fun to have batting practice on the side mirrors and the headlights as well. It's sort of understandable WHY people do it. Breaking stuff and doing illegal things has an element of fun. That doesn't mean it's okay, though. Sometimes the broken windows are simply a casualty of burglars trying to get that iPod you accidentally left sitting in your cup holder or the nice aftermarket stereo you dropped $200 on. Let's just hope it doesn't rain or snow, too.