Any exchanges of XRP for fiat currencies. Results in a credit to the ledger and the ledger only shows the XRP side of the transaction.

Holy shit that sounds like an insane safety risk! How is it possible that such an "exclusion" doesn't paralyze the entire network?

I mean, what if someone claims to have got more or less fiat than what was determined in the ledger? Assuming he tampers non-blockchain transaction ata.