In the US, the most effective means is to have your phone number listed on the National "do not call" list. It will not affect charities looking for donations, or companies that you have a business relation with, but it does stop others. See the link at the bottom of this page.
Here's a great article that tells you how to get rid of all telemarketers for good. There's tips on how to register for the National Do Not Call List as well as how to handle telemarketers on the phone effectively.http://www.ehow.com/how_5424691_block-telemarketing-calls-forever.html
Telemarketers call people to sale items and to take surveys.
The best way to stop telemarketers is to ask to be put on the national do not call registry.
Yes telemarketers can hang up. Have you ever wondered when you say who they want isn't there, they hang up.
Telemarketers call customer for various services they provide or sometimes to sell something and maybe offeryou their services.
No, you can't.
The best way to stop telemarketers is to register your number with the Do Not Call Registry. The Do Not Call Registry is operated by the government.
No, telemarketers are not allowed to call on federal holidays.
They get their information from large phone companies who we believe are selling on our numbers for extra cash to third party companies such as telemarketers
Telemarketers, collection agents.
Telemarketers can not arrest you. They might file charges against your person if you verbally assaulted them or issued threats against their person, to which the local police may respond to.
Telemarketers get in touch with customers by calling them.