As I browse through the trees submitted by other individuals, I am finding many duplicates. For example, one person has my 5th-great-grandmother listed as 3 separate individuals, all with the same birth and death date, all married to my 5th-great-grandfather. This is, unfortunately, the result of sloppy habits, probably just using the "hints" system to locate people, and then adding them all as new people, rather than linking them to existing people in the trees. People on this site (as well as other genealogy sites) need to stop relying entirely on the system's suggestions, and actually take a look at the data before allowing it to be entered into their tree.