Not being married is not a particularly good discriminator, compared to a lot of other factors.
For example, anyone working with kids needs to begin with a rock solid background check that needs to be renewed, not just reviewed, at intervals.
And those who do the background check have to be varied as well.
For example, Kevin Jennings, the homosexual “safe schools czar”, was known to be complicit in protecting and enabling a pedophile homosexual relationship between an adult and a student. So it’s vital to have someone who will ‘watch the watchers’.
Predators go out of their way to work with children, so the assumption should be that those who want to work with children are under suspicion, and actually need to be proven safe. This tends to go against the grain for most people, who are uncomfortable with “the assumption of guilt before trial”.
A good rule of thumb is that those who will break big rules also will break little rules, and if they are observed breaking little rules, they need to be carefully watched.
For example, boys and girls have zones on their bodies that responsible adults can touch without raising eyebrows, and other zones that are seen as personal, that suggest intimacy. They vary somewhat with gender. But if an adult in authority touches children on their intimate zones, even through clothing, this raises a big red flag.
Adults in a position of authority should very intentionally never be alone with a child behind closed doors. This is for their protections as much as the child’s. Private conferences are a no-go, as are any meetings or special get togethers. There should always be several adults and several children around.
Jerry Sandusky was "married", and had "kids" (albeit adopted).