Pro tip: When you want really want to convince people by making them understand, not by trying to be an authority, tell anecdotes, not ranks.
I had it happening to me again today that someone needed to be "I'm XYZ and that's because I know this is nonsense". Just tell an anecdotes of how this went wrong, if you know why it goes wrong and skip the " look at me"-part.
@sheogorath What I like about this is that a well-chosen anecdote also reveals a lot of context about who the speaker is without filtration through their "impression management"/narcisissm/insecurities. Maybe it would also help to stick the anecdote early enough that people don't prematurely dismiss you and leave.
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