Dude, the price were down to cents. Are you telling me people didn't know? That would be like selling your 40" LED-TV for 10$. People knew and tried to make a quick buck. Now they are pissed coz MT Gox doesn't let them.
The price was cents just a few months ago. It is totally unreasonable to expect someone who bought these cheap coins to have known that they were stolen. The Bitcoin economy is extremely unstable. Any number of things could have happened.
Any libertarian or anarcho-capitalist who supports a rollback is a
hypocrite.
You are thinking about it in the wrong way.
MtGox knowingly allowed stolen bitcoins to be moved from person A to person C.
They are responsible now to return from person C to person A, otherwise they are liable as helping the B person (the thief).