Car Alarms: 05 Ford Mustang horn alarm malfunction, ford mustang v6, ford mustang

Question
The factor horn alarm will randomly go off on my 2005 Ford Mustang (V6) while sitting locked in the driveway or garage with no one in sight.  Is this a problem others have had?  What could be a possible cause?

Answer
If this is a factory installed alarm without an after market add on I would have the vehicle looked at by the dealer.  A factory alarm only triggers by a door/trunk/hood pin.  This would lead me to believe at best you have a faulty pin switch, at worse a bad brain.  Either way, since the car would still be under warranty I would have the dealer look at it.