Once they hit the "must be open" age, you have to trust that those who have signed the Honor Code will not deliberately do damage to the profiles.
If you are concerned that misinformation may be posted, and incorrect family members might be attached, be sure to put as much as you know under a == Research Notes == header beneath the biographical text, and above the == Sources == header.
If you think it needful, a warning regards such can be added to the top of the biography.