Pebble, I think you're being too kind. You linked to the margin requirements for writing naked puts at E-Trade. They were identical to the ones at TDA that he was claiming was the only house where margin requirements were that low.
He then claims to have called E Trade and got confirmation of the rates (hardly a surprise). He then purportedly asked whether there was a minimum per contract requirement and the guy on the phone purportedly said he didn't know and would get back to him which he, purportedly, never did.
IF there were a minimum margin required per contract, there is no way in the world that they would print a margin schedule and leave that out. A schedule is a representation of fact that people visiting the site can rely on to structure their accounts. Somebody reading that is not expected to say to himself "well, that sounds fine, but how about a minimum requirement per contract, I better call and ask". So, IF somebody set up an account relying on the schedule posted on the site and then after a couple of trades received a margin call, not because of any plummeting in the account but because he wrote many out of the money naked puts and there was an undisclosed minimum margin requirement, he would have a cause of action and would win in court. Plus, the publicity would be very damaging to E-Trade. There is no way there is such a minimum requirement.
That 3-hour course in lieu of 3-years of law school was worth every penny.