In the old times the GMs had no special GM chars to login with.
These were introduced in a special update.
Of course it was tested before and CIP thought it would be enough to give the GM-chars no cap to make them unable to attack anything as they were unvulnerable.
Well as often they underestimated the creativity of people.
Take BPs of Light magic missiles (Mag Level 0 to use) and push them into the drag lord cave. Then even a GM can Level
We had a lot of fun on this Testserver but of course this “feature” was removed afterwards.