I did not borrow anything to purchase my shares in

I did not borrow anything to purchase my shares in my margin account, but they were lending them out anyway from my understanding.
My thought is if fifty people with an average of a 100,000 shares decided to move their shares out of their margin account at once it could potentially have a large impact on the market.
Like a counter attack against the shorts, with out costing anyone a dime. Except the shorts