Dubious spam protect method postings at the forum

[pwillener]

Topic http://forums.adobe.com/thread/506110

starting at http://forums.adobe.com/message/2974343#2974343

This user obviously uses some dubious spam protect method that auto-replies to each incoming message

The message you sent requires that you verify that you

are a
real live human being and not a spam source.

To complete this verification,
simply reply to this message and leave

the subject line intact.

Now every time something is posted in a topic that the user is subscribed to, the user (Clark@harkins2.com) receives a notification, and each time this auto-reply is sent back to the forum.

I don't want to discuss this very dubious method of spam prevention, but how we can prevent such feedback to be posted in the forum.  Is there a way to filter such things before they are posted in the forum topics?

(This is not the first time, b.t.w. - see also http://forums.adobe.com/thread/568498, http://forums.adobe.com/message/2367531, ...)

[pwillener]

If filtering of such messages cannot be implemented (quickly), I suggest that users of this so-called "challenge/response" systems are immediately banned from using the forum.

[pwillener]

And another one - this time it's a forum spammer that does it: http://forums.adobe.com/thread/583750 !!!