Generally speaking, callout threads are good for the forum. If the callout is warranted, the call-ee is outed, any questionable input they’ve been offering is seen in the appropriate light, and any advice they offer going forward is taken with an appropriately sized grain of salt.
If the callout is unjustified, it backfires and the call-er looks petty, ignorant, and vindictive while the call-ee is supported and re-affirmed by other members.
Not really any different than the occasional callout in the Bodybuilding, Powerlifting, or Bigger/Stronger/Leaner forums when newbies with big mouths get put in their place or vets need to defend themselves from cranky upstarts nipping at their heels.
(And, FWIW, the Credentials Thread has been re-stickied and should remain in place indefinitely.)