I am not short - I'm also not entirely sure of what you meant to say.
I am asking if you tender your shares (do they become unavailable for the broker to lend out) ? Shares held in margin accounts are normally "lendable" but perhaps if they become tendered they become not "lendable" ?
Yes, if you tender then your shares become unavailable for shorting.
Also, if you put your share for sale at a price (high price in this case) your shares become unavailable for shorting.
Basically, if most investor put sale orders for their shares (put $5) then it will be short sqeeze.