That's completely defeating the purpose of PoB.
Not Going to Happen.
Busoni is still working a solution, wait for a proposal and then we'll start discussing for a compensation if someone is in the red.
It's in alpha, it is written in red in the first post, these kind of things were going to happen, and might happen again (with a lower probability now)
Personally I've traded a tiny part of my XCP on poloniex, because trading more than 2-3% of your holdings at this stage is foolish. If I lose them because of a bug in the alpha, a hack on an exchange, of whatever, I wouldn't complain.
What about simply for the community agreeing for temporary high fees on Poloniex, until Busoni recovers the lost?
For example - 5% (instead of previous lower fee). This will motivate other exchanges to join, and fairly distribute the fee (the higher you hold and trade, the higher you pay).