dont use Ubuntu.

Why? Do you have a link that explains this perspective? Or can you provide a summary to get me started?

This part stood out to me:

… required to accept a license which forbid you to implement those extensions. As soon as you clicked “OK”, you could not work on any open source version of Kerberos. The goal was explicitly to kill any competing networking project

Could we not use this same tactic? I would love to see a Terms of Use drafted that requires federation participants to fully support the project. It could prohibit partial implementations, especially if extensions to the standard were being added before fully supporting the standard. Actions that seem to use embrace, extend, extinguish tactics could be explicitly called out and forbidden.