I did.
There were some pretty sharp guys but there were a lot of not so bright ones.
The worst elders were the ones that THOUGHT they were very intelligent but really were stupid.
One elder that fits that description was a man that loved to speculate on prophecies, Watchtower wording, someone's facial expressions or mannerisms. He truly believed he was more enlightened than anyone else. His only real problem, though, was that he was a liar. He'd talk about someone behind their backs and when it would come to light, he's deny it. He had a history of doing this and finally the lying elder got caught. He was deleted. To this day, 5 years later, he still thinks he was unfairly removed and believes he's always right.....but he can't help it. He's dumb.