You said: "I prefer to add existing gedcoms, rather than retype the entire thing in. Some of these files have 6,000 names"
Do you really trust the people from whom you receive these massive GEDCOMs? I have seen too much inaccurate and undocumented sloppy research. Some people are just name grabbers.
Twenty years ago, one of my correspondents was constantly finding ministers of this and that church who were related to her because they had the same surname as she did and she was a minister of the Four Square Gospel. She also found the progenitors of her (our?) line in Ireland and the West Indies and a whole bunch of other places, all ministers of churches of course.
I certainly do not want to take a chance of contaminating my carefully documented database(s) that I have been working on for the last 48 years!