Can we PLEASE once and for all redesign email and texting to be whitelist only?

Seriously, blacklisting doesn't work. We still have assholes that just because they know a line of text or a phone number can harass you forever. It IS harassment and needs to stop. We can always have the option of throw away blacklist addresses, but lets make primary email and phone numbers whitelist only as a standard feature. The business of SPAM would be dead overnight.