[Fedora-legal-list] icon trademarks

[Rave it]

Hi,
since some icon themes have trademark'ed and non-free icons problems and will be retired and remove from fedora,
https://bugzilla.redhat.com/show_bug.cgi?id=1005176

i'm thinking about to do a review request for faience-icon-theme.
https://code.google.com/p/faience-theme/downloads/list

Unfortunately this theme has also some trademark'ed and non-free icons like skype, facebook, twitter, etc.
Is it legitimate for fedora to remove those icons from the theme during the build prozecess in spec file?

Also are icons from opensource applications like ie. firefox, thunderbird free to use in a theme for fedora?

Thanks in advance

Wolfgang Ulbrich aka raveit65