I forgot this existed. I filled it out for fun, even though I get your reply was more rhetorical.

Your post advocates a

(X) technical ( ) legislative (?) market-based ( ) vigilante

(X) Requires immediate total cooperation from everybody at once

- for the specific forums, jobs and other things that may use something like this

Specifically, your plan fails to account for

(X) Public reluctance to accept weird new forms of money

- if the credits are treated as money

(X) Armies of worm riddled broadband-connected Windows boxes

- that will always be an issue, but I doubt it's too relevant here

(X) Extreme profitability of spam

- if someone spends a credit for spam and they think it's worth it, it might be an issue. But most spam wouldn't be worth it, IMHO, especially if it will be deleted from a forum, anyway.

and the following philosophical objections may also apply:

(X) Ideas similar to yours are easy to come up with, yet none have ever been shown practical

- well, yeah :)

(X) Sending email should be free

- this isn't about email, but I don't necessarily like having to pay to post. However, lots of forums will remain free, as not everyone will use this idea if it's implemented. And some forums have paid accounts now, anyway.

(X) Why should we have to trust you and your servers?

- why should we trust the credit system - important question, as we haven't thought out how it could be gamed or abused.