Thanks for the tip!
Dan, now that you have given me a tip after I specifically refused it, here is in return, my decision to my non-attack.
Actually I have posted the main ingredients in a post long time ago. As I said it is ugly decision but the benefit is it prevents decoupling of bitUSD (and other assets).
https://bitsharestalk.org/index.php?topic=3130.msg44854#msg44854For this scenario I actually suggest variant 3 (‘c.’ in the original post) of my early suggestion: close the position with the position of the longs that opened with prices closest to the price the short ( that is being force closed/covered) was opened. This way the longs will know that if the price goes up 2 times there is great chance their position (or part of it) will be force-closed, so they can take appropriate action.
Consider the above if you think it worth the ‘price’ of such rule in order to prevent asset decoupling, or do not… it is up to you now.