Never use a telephone, especially a HOME phone linked to your name to do anything illegal or private.
If you're doing something you don't want observed, use code phrases - prearranged.
All you have to do is this, and it neutralizes their ability to monitor you effectively.
Anyone foolish enough to not know the obvious won't be helped by your admonition, DA55.
"Welcome to Crime, Incorporated's interactive voice response system.
For quality assurance reasons, you call may be monitored at any time.
For Schedule I narcotics, press 1.
For Schedule II narcotics, press 2.
For forbidden images of people copulating, press 3.
For help in committing crimes undetected, press 4.
If you wish to speak to a Libertarian Party representative, you may press zero now."