I'll tell you a story of a dishonest witness family. He works for a construction company. His entire home is furnished with furniture taken from model homes that are on his site. He has never got caught.
He'll purchase an item from Home Depot, to do a home repair, then take it back and get his money back....every time!
He will buy Tim Horton's coffee for everyone in his crew, and when it's "roll -up- the- rim- to- win" time, he rolls up every rim on the coffees before he gives them to his crew.
He had an affair when he was an elder, with another elder's wife, and only, just "stepped down", and moved to another city.
Every time his wife goes visiting, she leaves with something....and when you go visit, you see it sitting in her house.
I could go on....so, would I trust a JW to be more honest than the average person?
NOPE...I think a great majority of them hide behind the title of being a JW and it's supposed reputation for being an honest group of people.