I just don't answer the phone
If the caller display shows work's number. Then the next day I'll apologise and say I was out of the house at the time.
( Lord Gnome, Tue 15 Jan 2008, 1:11, archived)

they'll get suspicious after a while
no?
(rigby happened on (and with added toothache), Tue 15 Jan 2008, 1:18, archived)

Apparently not
It's either that or explain that I'm not contracted to be on call-out anyway and that while I am perfectly happy to start early or finish late as and when necessary, I am not going to drop whatever I am doing in my free time and go back to work without any notice.
( Lord Gnome, Tue 15 Jan 2008, 1:25, archived)