Tension nobs aren't there to stop rigs from flopping over, they're there to ensure you're not constantly fighting with the weight of the rig when it is even slightly off centre. It also allows smoother motion when a really heavy (think supertele) rig is on the ballhead.
If your tension is set so tight that the head will not flop when it is off centre, then you end up having to fight to move your setup, then you're back at square one having to work against your ball head from the beginning.
Ballheads, tension setting or no tension setting, are simply *not* designed to be released without being first locked in position.
TME, you're wide of the mark.