An alarm can be a good deterrent too. A few weeks ago, someone tried to pop the locks on my neighbor's 06 Ram (who parks 2 spots away from me) that is a bone stock ST model, when mine was right next to it, fully custom. I am guessing they saw the alarm light blinking and didn't want to mess with it?

I've had people try to break into both of my Rams in this neighborhood, with no alarms, haven'd had any problems since installing the Viper alarm.