Bobby, the SEC has oversight responsibility for the DTC. If the DTC is doing something illegal or unethical, the SEC can absolutely force the DTC to act.
Here is a direct comment from Chairman Thompson-
"All of our operations and activities are carried out under SEC-approved rules and are subject to strict federal regulatory oversight."
With all due respect, one of the reasons Megas was able to sue his shareholders for fraud, and still have a sizable number of shareholders support his actions, is a lack of knowledge concerning the markets (in my opinion).
I am no expert, but I think I have a fairly good grasp of these basic concepts.