Considering that the original disciples were (generally) "unlettered and ordinary", I didn't give any thought to the fact that JWs often were uneducated or outright strange. As a born-in, I also had nothing to compare it with since I did not associate much with non-believers.
What did start to wake me up, though, on a similar note, was when I observed Witnesses passing dubious urban legends onto each other. It was a red flag for me that JWs were so credulous towards information that came from fellow believers. Their lack of skepticism got me to wondering what other things they were accepting uncritically.