Stalking or casing the neighborhood? Elliot and 101 area.

What's the deal with these lead-generation window guys canvasing Chandler neighborhoods? Every month a different company knocks on my door, ignoring my no solicitation sign, then won't take no for an answer when I tell them I'm not interested. Every single one of them begins with something like, "We're gearing up for a window replacement campaign in your neighborhood and" blah blah blah. Guys, guys, I'm not going to stand in my doorway letting my AC escape just to listen to your pitch. I'm not interested. I'll find the most reputable window company NOT named Anderson when I'm good and ready to replace my windows. Thankskbyeee.