Er... how, exactly, would the supply rise? Are you actually claiming that people would send new supplies of USD into an exchange that had just had its bank accounts seized? This makes no sense.
People happily sent USD into Bitfloor after it was 'hacked'. Twice.
No, they didn't. I was one of those people (theoretically Roman still owes me money).
After the hack, Roman gamed the BTC price on his exchange by freezing peoples
BTC balances but not their USD balances to prevent people from fleeing.