Chris Newman wrote:

> The $adult keyword should be removed from this draft on the grounds that the
> definition is too vague to provide any value for interoperability.  The
> mechanism is inappropriate as the rules for what constitutes adult content
> varies significantly by country, state, city, religion and culture (not to
> mention the rules for what constitutes an adult).  Thus it is not sufficiently
> i18n-aware and I do not believe it can be made so.
>
> Furthermore, it is controversial on ethical grounds as it provides a mechanism
> for inappropriate censorship.  Such mechanisms inevitably censor valuable
> material such as discussion of "safer sex", "breast cancer", "nudity in art" or
> similar topics which many believe should not be restricted to adults.
>
> Finally, I can not see any technical way to correct all of the problems with
> $adult.  It must be removed from the draft.

Ok, I agree with your arguments.

> Note that similar issues apply to the $Spam keyword but I believe they can be
> corrected.  As the definition of the term "spam" is controversial, I recommend
> using the term "junk" which can more easily be defined as we wish.  I would use
> four keywords: $Junk, $NoJunk, $AutoJunk, $AutoNoJunk.  "Junk" is defined as an
> explicit end-user indication they do not wish to read similar messages in the
> future.

This is too far reaching. I don't think I can reasonably explain what is "don't
want to read anything similar in the future".

>  "AutoJunk" is an automated system's guess that the end user might
> consider that message Junk.  As $AutoJunk and $AutoNoJunk are error-prone, an
> MUA MUST provide the ability to view $AutoJunk messages with reasonable
> convenience.

So basically you are suggesting that $AutoJunk/$AutoNoJunk are read-only?

> This allows the combination "$NoJunk" and "$AutoJunk" which indicates the
> automated system made a false-positive (very useful information to retain).
>
> Now if present use of $Junk and $NoJunk conflicts with these definitions, we
> should select new names which do not conflict.

I believe Junk and NoJunk are in use (no leading $).
Does anybody have any information on how there are used?

Alexey
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