Struggling to see your point here.
Margin is margin. Just have enough in your account to cover your trading activities. It's not hard.
Margin here refers to stocks margin and maintenance margin at that.
Say I had enough money in my account to cover my margin needs as at 9/13/2012. All things being equal (stock price remaining the same), on 9/14/2012 they change their maintenance margin rules for semiconductor stocks (eg) or mid cap stocks for example as they have the right to do. Unfortunately with this sudden change in margin policy, I no longer meet the margin requirements for open positions. Positions are liquidated. So apart from having about 10 minutes to react to margin policy changes (no good for swing traders), you have no time to save yourself.
Another example is say I had enough money in my account to cover my maintenance margin needs as at 9/13/2012; stock price remains the same. On 9/14/2012 the liquidation algorithm that nobody knows its details is changed without notice or 10 mins notice to "protect IB and its clients" and my positions are affected. The positions are liquidated.
A third example, say I buy Bank of America at $10 at 9am September 12th. At 12noon on same day, the stock moves down to $10.90. now IB can decide at 11am that Bank of America is not safe and poses a risk to IB and its clients, determine margin rules for it at that time and auto liquidate my positions with 10 minutes notice.
So how is a client supposed to know when they are about to be auto liquidated and how are they going to know which is the maintenance margin policy currently in force for equities? As the Agreement says the published margin policy on their website is not actually what is in force and can be changed anytime without notice. It seems like extortion to me.
Whenever this issue is raised on forums, there are no IB representatives to defend it, either the thread is closed or the user banned on account of being an IB competitor or otherwise disgruntled. I am just considering IB for an account but having read numerous online complaints, i wanted to get this matter clarified.