Earlier quoted context omitted.
Sure, but my point still stands — you have more tools to work with in email. For what it’s worth, I can usually contextualize a message from the subject line and the sender’s address without needing to dive deep into headers. (Phishing is definitely a real problem, but it’s not unique to email in this discussion.) Now compare that to the PSTN: what does 555-123-4567 really tell you? Not much. It’s just a string of di…
You have more tools because the market created them because it’s a federated protocol. The PSTN is a different case where market forces don’t align incentives with spam reduction. This is why regulators like the FCC exist.
At that point, we’re repeating the same values clash — you see regulation as a workable fix, I see it as evidence of fragility. I don’t think continuing this line is going to get us any further.