I was very concerned about that when I was an elder. I can think of several senarios where an elder could be potentially at risk. I got into the habit of not giving my personal opinion on anything. If someone wanted to know what the WTS take on a particular issue was, I'd research and give the printout to the person.
If most elders felt this way, then there was no reason to ever go to them for advice!
Can you sue someone for being a complete idiot? Then I would try!