The GedCom you upload will be looked at by the system, trying to find matching profiles (= persons) but you yourself create profiles from it for each person. The Gedcom file itself is not accessible by others. As Linda states: you can hide recent profiles from sight momentarily.
As Lucy states: do not worry about how things look at first. You can easily edit later on. Just, please, make sure the basics are in order (at least one date, at least one real source, at least one location/country) and start with a small GedCom.
If your question is really about erroneous Gedcoms with incorrect links: do not import the incorrect profiles and links. Editing a true ugly profile is easy, editing a wrong profile is very difficult.
If you would like some advice on some profiles: just post them here so we can have a look.