. >> reporter: margaret newton sets her home security alarm system where she lives in prince george'snty every day. she says it makes her feel safe. >> i had some friends who had it, so they were satisfied, so i got it. >> reporter: but recently, a stranger showed up at her door, a salesman from a different security company wanting newton to switch services. >> windows on. >> and right away, i'm already frustrated. no, no, no, i don't want it. >> reporter: newton got a phone call the next day, asking if the salesman could stop by. >> and he was very polite and all. >> reporter: the salesman convinced newton she was on a month-to-month contract with her existing security company, and he promised to sell her a wireless alarm system so she would no longer so to replace batteries. he also told newton the company's local, so it would be easy to get someone out for a maintenance, unlike her current company, located in california. newton was sold. >> most of the time, i read everything, but this particular time, he was so friendly and so talking, so i agree. i say, well, okay. i signed the c