General Discussion

to let them know that you are actually reading their crap, even just to the extent of trying to get rid of it.

It's like the "Do Not Track" flag in browsers or the "Do Not Call" phone registry (that was harvested by scammers to find new targets.)

Best thing is to get a ever-growing list of spammers in your email client/server. Just like the "Block Caller" for phones and text messages.

What would solve almost all of these problems would be a charge per message sent per customer. I'd say that an email/txt/phone provider would allow for example:
- 1,000 messages sent per month free as part of the plan
- Every additional message would be $0.05 - payable to the provider and used decrease subscriber costs.

Spammers send out multiple thousands of emails/txts/voice per day. That $0.05 would be a serious impact on their model.