[MichaelDickens]

Unless I'm missing something, this doesn't seem hard to fix: just let users decide whether hidden numbers should be ignored or received.

[bryanlarsen]

Doesn't that make it more likely people are going to miss important calls from their Doctor's office?

[chongli]

Just send the call to voicemail. Doctor's offices always leave voicemails. Spammers sometimes leave voicemails, sometimes not, either way they're easy to filter out / ignore.