I've looked at this package. Firstly, yes there are branding and GNU
FSDG[1] problems with some of the entries, so please open an Issue for those.
There are only 64 fortunes in the package, so fixing the English version is
doable.
Note that Ubuntu's 'Server' is like Trisquel's drawn from the same package
repos as the desktop flavour. So where the software mentioned is free it is
also in Trisquel.
However, there is a wider point raised by this thread. Trisquel is
interested in Branding and GNU FSDG issues, *not* arbitrary censorship of all
things 'open source' just because we happen to have philosophical differences
with them. If we believe in software freedom, then we better also have a
strong grasp on freedom of speech and opinion.
[1] https://www.gnu.org/distros/free-system-distribution-guidelines.html