As a newbie researcher, I chanced upon an online family tree of a cousin's ancestors, set up by someone I didn't know.  I emailed the tree's owner, thanked him for all his work, and offered to send more information, to which he eagerly agreed.  Soon the tree correctly contained the details which I had provided, without  attribution; nor was any notice sent separately to me.  I emailed the owner to ask about his protocol in a situation such as this.  He replied defensively that he had "no obligation of any sort" to me - "after all, it's MY tree".  True, - but it seems that here was a "taker" with a sense of entitlement and perhaps poor manners as well.  Happily, all my other experiences with family tree researchers have been wonderful.
Selma Sheridan
Oswego NY