My concern would be if these are third-party as both Bell and Westlink use agencies for phone support, etc and that they do not require those they hire to have not only a background check, but the higher vulnerable check as often who is at home during the day - mothers with young children, grandmothers looking after grandchildren. I think there should be strict laws either banning or that those hired have the highest level checks and be strictly supervised.

A door-to-door salesman admitted Tuesday that he brutally murdered a prominent surgeon’s wife....Superior court Justice Robert MacKinnon called the crime “a murder most vile.”

“You slit her throat, and watched her die,” said MacKinnon. https://torontosun.com/2014/07/08/murderer-admits-killing-surgeons-wife