My parents get mad at me for not picking up the phone when I'm near it or when they're unavailable to pick it up. The phone is in the kitchen so I tend to avoid that place or when I eat there, I try to finish ASAP, in case it rings, lol.
I don't care much for those sales calls though. I would just hang up and I can just tell my parents that it was one of those stupid calls but when a friend of my parents call, I get anxious about saying who called and what for, etc.. My parents also expect me to ask them why they called if they didn't state their purpose so I have no excuse not to know why they called.
When my parents are out I HAVE to pick up the phone because they would find out if I didn't so I just pray that nobody will call...