Garrett, you have to understand that people will link profiles to family trees, but that doesn't mean they are linked correctly. That is the reason why wikitree says that sources, preferably primary sources, like birth, marriage, death records, are used to prove dates, locations, and relationships.
I don't use ancestry so I can't personally see any of the links that you are showing. There are some sources on ancestry and family search that are made up of indexes from user created family trees. Those type of things are not valid sources unless you can find the initial sources that are used to form the relationships, other than an ancestry hint created by other people's family trees.
Try looking for sources on family search which has free access to everyone with no subscription.
You said there are fake identities. I doubt there are many people that someone created on a tree just to make them up. What's the purpose of doing that, but there are a lot or incorrect relationships because the wrong people were connected. That is why you may think they are fake identities. If you look at the actual sources and use the information on the sources, you aren't going to have fake identities.
