Although we would like everybody to take free software seriously, what you do
on your own computer is ultimately your decision. What we kindly ask of you
is to refrain from posting anything in regards to suggesting nonfree software
as an option on our forums as it may tempt some people to use it (thus going
against the spirt of the Free Software Movement).
A more serious reason is that if we were to suggest on the forums that using
nonfree software is ok, we would lose our FSF-approved status as the forums
are an extension of Trisquel's documentation. We would therefore be no better
ethically than the common GNU/Linux distributions.
You may wish to check out the Free System guidelines for more information.
https://www.gnu.org/distros/free-system-distribution-guidelines.html
I hope this clears up why we don't want anybody suggesting nonfree software
here.
No hard feelings =)