I think it can depend on why they are ex-JW's, not all are honest either, not all are dishonest. Some are very bitter for good reasons others just couldn't hack it., still others have a very good bible knowledge and have legitamate biblical reasons for debate and want to challenge to society.
I found it all very interesting, and though I am on the fence so to speak I can see both sides of issues and without blame finding it is always good to see the fence and whats on either side from a non judgemental point of view.
I have always maintained some of the best folk ever met in the org, and some of the worst, and their are others that need the org, they know no other life and fear what they don't really know, they neither hve the courage or the will to leave even knowing that the org is wrong, and for some in power it is an ego trip they love the power and lording it over others, I find these ones the worst type of witness as in the world they would be booted up the ar*se like no bodies buisness, but in the org they are someone, even if they are only 5ft tall and full of sh*t.