Honestly we've had enough from this guy. Our policy is we don't actively go after and ban people who share accounts but when you share accounts and cause problems then banhammers fly. There's no question it is idiotic to share your accounts with someone who could potentially take your stuff and screw you over but it's doubly idiotic to be on the other end of that deal and brag about it.
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Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z) Probability