Google Voice said that it is now possible to automatically redirect calls, texts, and voicemails from any of the numbers in our database directly into your spam folder.
"If, like me, you have more interesting ways to spend your time than talking to telemarketers, the "Report Spam" button in Google Voice is probably your best friend. But wouldn't it be great if the filtering could happen automatically, before unwanted calls even reach your phone, the same way Gmail filters spam before it gets to your inbox?
Thanks to the help of the thousands of Google Voice users who mark calls as spam everyday--and our own spam identification tools," stated Google.
"You can enable this feature on the Calls tab of Google Voice settings by checking the box next to Global SPAM filtering. And if a number ends up incorrectly marked as spam, you can easily unblock it by selecting the message and clicking the "Not Spam" button in your spam folder."
[Source: Google Voice Blog]