[Leaning Right]

the phone companies need preventive measures on this type of activity

I'm guessing that the phone company gets a slice of all fees billed to your phone. So they have very little incentive to take action here.

[DannyTN]

"I'm guessing that the phone company gets a slice of all fees billed to your phone. So they have very little incentive to take action here."

You're probably right. But if so, then that's a scenario where we need government intervention. Government regulations wouldn't be necessary if companies always did what was right.