Did they get to read the RFC before the meeting? If they had access but didn’t use it, then this is out of line. But if they only got the RFC during the meeting when they were asked to comment, then flipping out is overboard but the feeling is understandable.

Fair Q. It was a multi-week process where the doc was published/open for written comment and then we had a series of meetings for live discussion as well. The engineer in question just completely mis-read where we were in the process and thought this was being announced as a mandate in the one particular meeting.