wHY.. because those scammer will keep changing number.. Google voice, magic jack and many companies offer free numbers.. so getting blocker is not really good idea.. just don't answer, dont call back.
If the phone isn't answered, the scammers often leave an “urgent” callback request.
Note that the IRS will never: 1) call to demand immediate payment, nor will the agency call about taxes owed without first having mailed you a bill; 2) demand that you pay taxes without giving you the opportunity to question or appeal the amount they say you owe; 3) require you to use a specific payment method for your taxes, such as a prepaid debit card; 4) ask for credit or debit card numbers over the phone; or 5) threaten to bring in local police or other law-enforcement groups to have you arrested for not paying.
I suggest people should play with the game.. i called them I said I am donald trump and i have lots of money.. he said you are joking, then I said I talked to my friend in FBI and you are reported.. then that guy said turn over and bend over...
i then asked how to pay, he said, you need to pay by cash.... what a stupid scammer.. you know what.. if they use us phone number to play with us, I will use other unlisted us phone number to fight back.. calling them every day with no caller id..
JUST FYI, those scammers use different number different week. They are just trying to fish some fool, after they get the money, they will keep switching numbers. I really want to see how they get money..