I have seen this as a recommendation, and I have seen websites that sell very realistic signs for the lawn etc., also there are some very good non monitored (no monthly fee) system that can be installed by anyone as they are wireless. One thing to keep in mind, the bad guys are probably aware of the designs of the fake signs, which means they might be an invitation.......
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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