A salesman pushed his way past my wife and when i came up and showed him the no soliciting sign on my door, he still wouldnt leave. After many many different reasons why i was not changing my current system and that what components i had were none of his business.
I became very uncomfortable with his demeanor.
It took at least 20 "WE'RE DONE" and a few "GET OUT" he finally left. Dont let them on your house, it is a contract nightmare as well as a pushy sell.