Assignment task: Are these solutions ethical to reduce spam? What problems might they create?
1. Require an explicit opt-in of subscribers
2. Require labeling of email advertising (all commercial emails must include ADS on the subject line)
3. Add a cost to every email that is sent for ads. A micropayment systems is proposed
4. Ban unsolicited email by laws (laws to prohibit spam as those laws made to junk faxes)
5. Increase sophistication of SPAM filters and apply the solutions to texts.