You're absolutely right and I am relieved that they did correct some of the incorrect items, though the individual did get rather snarky with me about it. A small price to pay.
People that play fast and loose with facts when they simply collect names on their trees are creating problems for those people that care about truth in their family histories. It's also disrespectful to the ancestors and the lives they led to deliberately disregard facts. Even if the lives they led were less than 'admirable.'
Wish they'd get another 'hobby' and move on.