In the magic world where capitalism's "vote with your wallet" actually works (which as vegetablepotpie points out is fictional), email addresses given to corporations have the form "[random base64 UUID]@generic-mail-service.example.com", phone numbers are similar but base ten, businesses don't distinguish between 'real' names and "John Q Smith", and mailing addresses (given to corporations) are of the form "[random base64 UUID] care of [US postal service or a more cooperative competitor thereof]".

(I guess this technically assumes that voting with your actual vote also works, at least for the purposes of removing abusive know-your-customer laws, but lack of gratuitously harmful regulation seems in line with the libertarian-esque philosophy behind "vote with your wallet", so... eh.)