The Blue Max wrote:

Humor the public a little, we did not mean to suggest that people
actually try to do this! That should have been clear from the last
phrase. However, it would be the ultimate form of poetic justice if
this could be accomplished without hurting innocent parties!

Actually, some people have tried what you propose, trying denial of service
attacks on the spammer's sending systems. That usually results in an even
more overwhelming attach from the spammer. I've read news reports of people
who have had to switch ISPs because of the viciousness of the retaliation
from the spammer.
--
Brian Tillman