Michel, not that I've ever copied anybody but perhaps you could add a new section to the user instructions for the site:
The "Ask nicely" optionThis option is available to all UT members. To use it:
1) Click the envelope beside the other party's name.
2) Type "Hello, I'd be grateful if you'd stop copying me on your Universal Thread responses, thanks very much!"
3) Press Send.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1