Ubuntu's "No Open Ports!" policy questioned by Avahi developer

Lennart Poettering, developer of Avahi, discusses Ubuntu's "No Open Ports!" policy in his blog syndicated on Planet GNOME. That policy is supposed to create a more secure workstation after a default installation, but at the same time makes its usability and comfort for users go down considerably. Lennart questions the validity of the reasons behind that decision as far is Zeroconf/Avahi is concerned. Another blog, this time on www.kdedevelopers.org takes up that policy in relation to the crippling of CUPS's convenience features on a default Ubuntu installation and puts it into the nutshell "you can't use your system for printing, but at least it is super-secure".