I entered info on Ancestry.com. Went back some time later to update info and found someone had changed my father's name. So corrected it. Found my mother's birth info had been changed. I corrected that. Went back to update after another family change. Oh yeah you guessed it. I found my parents info was changed to incorrect names for both of them the 2nd time. Mother's birth I fo wrong again. So I left it and Ancestry.com completely.
Cautionary tale. If you use that site may I suggest you confirm info with outside sources.