LPT: If a salesman comes to your door trying to sell you a home security system, always tell them that you already have an alarm system set up. Burglars will often impersonate salesman to scout out vulnerable houses.

Burglars do this to check for alarm systems, dogs, single female homeowners or the elderly. If you're suspicious about a salesman, ask for their company issued ID, if they can't present one, don't believe them. You can also buy fake cameras off Amazon for around $10.