Didn’t you mention elsewhere in this thread that Suse and Red Hat patched Docker, not just to backport fixes but to add features which upstream explicitly didn’

Didn’t you mention elsewhere in this thread that Suse and Red Hat patched Docker, not just to backport fixes but to add features which upstream explicitly didn’t want merged? Surely Docker has a registered trademark. So following your reasoning, Suse and Red Hat should have stopped using the Docker trademark. Yet they didn’t. That example seems to contradict your argument that distributions are very careful to respect registered trademarks, while considering unregistered trademarks to be basically a free-for-all.