"FINRA is a privately held SRO that has nothing to gain by assisting honest, concerned EIGH shareholders."
A naked short position, which seems to be a concern of some in spite of a total lack of supporting evidence, could not be established except through the brokerage system, which is regulated by FINRA. Hence, it's their area of responsibility. FINRA's creation had to be approved by the SEC, if that gives you any comfort, and its job is defined by a set of rules. If it were to act arbitrarily it would be sued.