Speaking of comments...There was one brother in our congregation (an elder until his health got bad) that would routinely make comments that were directly contrary to what the WT/book stated. For example, there was recently a question on the review about Lev. 5:1 where they asked why is important to report wrongdoing to the elders, and the "approved" answer basically says that if you find out something that someone's doing you need to tell the elders so that they can 'help' them, otherwise you share in his sins. If he were around for that one, I have no doubt he would've answered referencing Matt. 18:15 (where it says to go to the person first, and not involve the elders) and pointed out that Lev. 5:1 was only in a case where the matter was publicly known and people were asking publicly for witnesses to come forward.
He very frequently played devil's advocate, but was so entrenched and looked up to in the congregation no one questioned it (except for some of the elders, but he was close friends with many so they let it slide). One elder even told me that he was almost appostate because of some of his private views. I wish I'd woken up before he died, as I now suspect he was awake but stayed in because he and his wife were in poor health and all his family was in. It would've been nice having the support of a well-respected ex-elder while trying to make an exit.
Oh, and the worst thing about commenting, for me, was (since I don't do it often) after the meeting everyone feels like they need to come up and congratulate me on my wonderful comment. It's so insulting being treated like a child who needs encouragement.