That time he showed up on metafilter with a sock puppet and talked about himself in the third person.

https://www.metafilter.com/102472/How-to-Get-a-Real-Educatio...

"As far as Adams' ego goes, maybe you don't understand what a writer does for a living. No one writes unless he believes that what he writes will be interesting to someone. Everyone on this page is talking about him, researching him, and obsessing about him. His job is to be interesting, not loved. As someone mentioned, he has a certified genius I.Q., and that's hard to hide." - Scott Adams, as plannedchaos

Using a sockpuppet account is hardly the crime of the century. If that's your worst criticism of him then he's doing very well.