Social Engineering

I was home last week when a couple of guys knocked on my door. I hate it when people ignore the no solicitation sign that is at the entrance to our community.
They were wearing Honeywell shirts and said they were in the neighborhood offering to upgrade five people to the latest greatest alarm system for free.
I talked with them a bit about what the alarm system could do, and they did talk a good game. But the situation seemed kind of hinky to me. Isn’t that just what a bad guy would do to try and find out what security protections I have.