Today I was with my two kids and this man came to our door selling an alarm system from Vivint. I told him clearly "NO THANK YOU" through the window of my front door - he persisted and persisted. After three two times of telling him to leave his information and if we were interested we would contact him he finally left, and quite upset at that. Just a note - I never did opened my door and he still didn't seem to get it. The interaction was uncomfortable verging on "should I call 911". Just a heads up.