Why did you revert? It would seem to me that they were in the wrong for being possessive, and assuming your efforts were in good faith, perhaps one could take delight in watching them running and squirming in anger. I would have probably just ignored the message and kept making contributions, but I understand the turn-off.
When it is about randoms on the internet I don't care enough. So I would do the same as parent poster.
Standing up for things is mentally expensive so you don't want to stand up for everything in your life, stuff on the internet is not like if someone forced into your living room.
