If you answer the phone and say, "Hello, you're on the air" most telemarketers will hang up quickly.
Caller ID should be more detailed: "Wants Help Moving," "Going to Whine," "Will Ask to Borrow Money."
I don't own a cell phone or a pager; I just hang around everyone I know, all the time and if someone wants to get hold of me, they just say 'Mitch,' and I say 'what?' and turn my head slightly.
- Mitch Hedberg