I'd rather have a system where there's a small investment cost to making an account, but you could always make another.
Imagine A system where there's a vending machine outside City Hall, you spend $X on a charity for choice, and you get a one-time, anonymous token. You can "spend" it with a forum to indicate "this is probably a person or close enough to it."
Misuse of the system could be curbed by making it so that the status of a token cannot be tested non-destructively.
I’d love something like this implemented for email.
Sending an unsolicited email to a random person X requires you to pay a small toll (something like 50p).
Subsequent emails can then be sent for free - however person X can “revoke” your access any time necessitating a further toll payment.
You would of course be able to pre-authorise friends/family/transactional emails from various services that you’ve signed up for.
This would nuke spam economics and be minimally disruptive for other use cases of email IMO…
Do you think there is a price point that locks out spammers without locking out poor people?
Something Awful made you pay $10 for an account. Directly to the forum. If you got banned you could pay another $10 to try again. Somehow this didn't lead to that bad incentives even though you'd think it would.