Just to add a bit of context, the current round of worldwide vandalism that we’re seeing has something like this as the first non-empty changeset created by a new user. That isn’t 10 objects, or 100, or 1000 - it is 9000 changes in their “first” changeset.
I’m sure that a technical restriction could be placed that stops “new” users doing that but still allowing StreetComplete etc.users to do lots and lots of editing!