We already have added a NO pre-1700 profiles imports from GEDCOMS.
Now, in addition, I think we need to implement the following 3 rules:
1) The first GEDCOM import from any NEW member is limited to 25 profiles, preferably starting with the Member's Parents and going back from them. Siblings, aunts, uncles etc., of course, are welcome. All new members will be told this clearly when they join. They will also be told that while we have a collaborative one world tree, they are responsible for "cleaning up" the profiles they manage or adopt, checking names and dates and having at least ONE valid source that confirms the person's existence. The "Other Last Names" box also needs explaining. Perhaps there ought to be a "adding and editing profiles" tutorial ?
2) After 60 days of membership, a member may import a second GEDCOM, limited to 50 or 75 profiles (Sysops can decide a number between 50 and 100), again preferably linked to their family tree.
3) After this, members are free to import GEDCOMS back to the 1700 date limit. A clear rule will state: Only ONE new GEDCOM per member every 48 hours (to give our operators time to check them for duplicates - some problems have come because new members uploaded multiple GEDCOMS in one day!) Hopefully this will give both Newbies AND the Mentors/Arborists who help them learn the ropes of WikiTree both the ability to upload via GEDCOMS where one to one creating profiles might be too much work and then check their responsibility level - how they work with the profiles etc. etc. before they overload.
One thing I have heard from members is that they would like CLEARLY STATED POLICIES about these matters.
We might also consider adding something to the Honor Code that states:
"I accept Responsibility for managing the profiles I create or adopt on WikiTree; this includes editing the biography & sources sections to confirm what is stated and cooperating with other members when merges are requested."
I think these are what is possible to grow and still keep our "wiki" character, but limit the number of duplicates created inadvertently and Unsourced profiles.