Most of the questions I've read on this subject seem to be about the merging of orphaned profiles in to their own family members, not the adopting of a profile just because you can add info and clean it up and possibly maintain it going forward.
I've adopted the profile of John Crabb as I have a special interest in the county of Cornwall in England, and will most likely end up adopting his entire family as they're all orphans.
Is there any reaon why I shouldn't do this?