When you make a deposit you are extending credit. In the case of Mt. Gox, or any other Bitcoin exchange, that credit is secured by nothing and insured by noöne. Advice, going forward, for managing counterparty risk: (1) Split a $100 transaction into 10 $10* transactions executed incrementally (send $10 of BTC to Mt. Gox, exchange it, transfer it out, and only then send the next $10 of BTC over). This keeps exposure a…
This is an old anti-scamming solution and is very useful in some settings but this isn't really one of them. The main problem here isn't really losing your money immediately after making the transaction. Just making the transaction in one swoop and immediately withdrawing your money after is much more efficent (in terms of both time spent and fees).
Most people weren't screwed because they made one large transaction just before things went wrong - they were screwed because they kept money for long periods of time on gox. And yes, you can argue that some people just couldn't withdraw for months - but if they wanted to use gox and use your scheme it would've taken a year to execute all of those transactions.