I am honestly enraptured with crossing this topic here, as "Non consenting Home Phoning ", for whatever "reason" it might be, is an eternal Internet annoyance. I am delighted that my "Brothers in Arms" - End_User and colwarg, perfectly pointed on Avast excessive activity, certain "misbehavior", one of common policies within software programming hidden world.
"Free" users actually have no right to reprimand Avast, in spite of its arbitrary, somehow invasive home-chatting behavior. I do like abundance of customizable functions, where the best one is handy and quick shields control. The worst one, nonexistent function is that you can't make it quiet. Here I miss old good practice, when pack of AV definitions we used to download manually, without "nasty punks" calling home, who knows why and for what exactly.
Good security can be maintained, as in a WWII Atlantic theater, with total radio silence. I wish my Windows PC would be silent to "Internet Ocean" as a submarine in a war zone. AV software should work more like sonar, which only announces potential threat to me and all decisions are left to captain - me again.
A rule of thumb for any good software is that it should offer full customization for advanced users, with no auto-deviations from "orders". For that I would be willing to pay in gold. Whether AV Companies like it or not, your/their software is secondary defense line. Primary defense are strict NTFS security settings with recommended work in Limited User Windows environment, supported by extra configured Firefox add-ons NoScript and AdBlock+, running in sandbox eventually. For email client use Thunderbird and that's it.
In the world and Internet particularly, where no one can trust anyone, including own governments, persistent AV software dubious umbilical and hidden traffic with home servers are suitable tools for all kind of "extra activities".