I would agree that it can be a significant privacy issue, especially when you start looking at the people who afford such systems. Me personally, I would probably be OK with a screened customer demonstration or two, but that sort of thing could get real old, real fast if you know what I mean. I sure as heck wouldn't want the dealer calling me all the time asking if he could bring potential customers in my home. But that's just me. Perhaps after you install your system, you can volunteer to open your home to strangers. It's kind of a big favor to ask, to bring strangers into someone else's home, so I am certain it's not one they care to exercise casually.