Yes but the hard part is knowing who to send to it. Currently, services for this use a honeypot to gather spammers' numbers; not sure how that works given that

Yes but the hard part is knowing who to send to it. Currently, services for this use a honeypot to gather spammers' numbers; not sure how that works given that they spoof it anyway. Also any off-phone service relies on setting up forwarding from some voip number, which is never quite the same as a real one.