In a matter of minutes you can....

[AUFred]

research an unreal amount of information on an individual or an address or a phone number. Why can't telemarketers create a data bank that says..."In 20 plus years there has never been a cold call sale to this number." Might be a trend.

 

[Jackass master]

I usually just tell them they are violating the law and if they call back i will file a complaint.