What irks me are private trees - private in the sense that the owner is quite happy to take all records etc, from public trees but keep their own tree private, not even having the courtesy to reply to messages from well-meaning public members who simply wish to find out how they may be related. There should be a way of (not by making your own tree private which would be totally pointless) stopping records being taken from public trees by private tree members.
Okay rant over, time for a cup of tea.