I was entering a family of cousins this morning and one of them, Emeline Conger- 9 showed an existing duplicate, so attached her to her parents Reason Iams and Phebe Clark. But there were existing parents Rezin Iams and Phoebe Clark (which hadn't shown up as matches when I created them - Boo) Anyway it wasn't too bad as the parents were orphaned and I just adopted them and merged into them and cleaned up the results. Those were the only ancestors but Eleanor and her husband Ephraim Conger have a full line of descendents all the way down to the present, and all orphaned. I decided to look to see what had happened.
It turns out a Ralph Polen-56 joined Wikitree on 10 Sep 2012 and added a GEDcom of about 1000+ profiles the next day. He then was fairly active until 17 Dec 2014 when he left. Now most of his activity during this time was merging, which is fine. And it appears the information in his GED, RALPHP~1.GED comes from cemetery records from the Greene County Pensylvania area. As such, each of the profiles do have a real source And they typically have birth and death dates which is good. But they don't have a real Bio and they do have some junk. So had I known this before the Clean-a-thon I could have gotten a ton of credit for cleanup I expect. Anyway, if you have relatives who died in Greene County, PA you might want to look up this GED (go to Ralph's profile and click on his contributions) and help clean it up.