First of all, thank you for your kind words, I really do appreciate them ! :-)
The "Bounce" function can be, as we see in the article, a great help, by sending to your correspondents a message that states that their mail couldn't be delivered.
However, two things can make the "Bounce" function less or not effective :
1. The SPAMmer doesn't check for bounced messages. In that case, bouncing them won't help you and will just increase bandwidth consumption on your network.
2. In some instances of specially crafted SPAM messages, your mail provider may be tempted to "fill in" your address in the bounced message or add other information that will, in fact, reveal your address to a SPAMmer and/or confirm that you received the SPAM. This of course supposes that the SPAMmer or the computers he uses take the time to read all bounces, which may or may not be the case.
All in all, "Bounce" is an extremely powerful feature. It should however not be used without carefully weighting the adverse effects it can have -- it is up to you to see if the mail you received will fall into one of the two categories we just saw.
Let me know if this helps !