I think this is a 'no-win' situation.
Most of us that use this site are careful about what we put online and wouldn't use other people's carefully researched information without asking.
My tree is online but it is private and I give access to people who ask.
In spite of this a few years ago I gave access to a lady who with distant connections and she added not only the available information (which was fine) she added all the living family as well. This information was not on my tree so she must have looked it up and this included the death of my niece who had only recently died leaving two very young children.
She put this in her online public tree.
The email I sent was carefully worded but she got the message and they were removed!
Equally I have had people who have been extremely grateful and happy to share their own information.
Without these people I would not have been able to progress my own tree as far as I have.
Definitely a 'no win' situation
Jo