Given the possible recent leak of the Mt. Gox source code and database, what would the core developers and mining community think of locking the apparent large wallet balances belonging to Mt. Gox, Mark Karpeles, and Jeb McCaleb by changing the protocol for now?
The idea would not be to accept any transactions spending these bitcoin until the Mt. Gox bankruptcy case is sorted out. A committee, possibly appointed by the Bitcoin Foundation, could verify proper ownership before the coins are cleared for spending and a change back is made.
This would be a bit different than the idea of taking the coins permanently, or permanently invalidating them. The intention here would be to simply assist the legal process.
I know this is not something which can be done for every theft, etc., but we are talking about 6% of all bitcoin mined to date, which are presently tangled up in a real legal mess.
I suppose a general principle to govern this could be that when an entity controlling greater than some number of fraction of bitcoin is subject to legal action, such as a bankruptcy, charges of fraud, lawsuits, etc., that coins may be locked pending the outcome of litigation.
Possibly the most appalling idea I have read on this forum and I've read a few.