Dad, Uncle, Brother in that order, are the people most likely to abuse,
It's very sad when people feel the need to be very careful with their children safety,but this is the out come of abuse, those individuals that have abused children cause this, they are responsible for the damage.
I totally understand the caution, I myself do not automatically trust, because I was abused, and know how easily it can happen, and would be devastated if any of my children, ours or other were exposed to abuse.
My husband and I do a lot of activities with children, we are always cautious so as not to put anyone in a situation where a child could be vulnerable or an adult could be vulnerable to accusation,
Form a personal code of conduct and stick to it, and write one out for any organisation you take part in. cover any eventuality and everyone will be safe.
It's extremely important that positive male role models do not disappear from the childhood experience.
Our society needs to have a balanced input.