These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Calling the Inter NIC server's insecurity 'chronic' is like calling water wet, to emphasise. However, there's still the Uplink Test Server that you can break into to cover your tracks.
Bah, that's basic. Do a Trace balance transfer mission involving a large cash amount. Note your bank ID & IP, get back to the account of the TBT mission, transfer all of them to your account, delete transfer log, disconnect, then delete transfer log at your account, then clean all bouncing logs. Voila, you now have money to buy everything you need (if the money is more than 200000). Of course, given the short timeframe for deleting all the logs makes it really easy to get caught, makes this a Death or Glory Attack. But, hey, high risk, high reward..
That example actually demonstrates the problem even better: You don't have to delete all of the transfer logs—just the one that directly connects to your gateway. So if Inter NIC's your first connection point for both bank hacks, all you have to do is clean the bank logs, DC, then go to Inter NIC and delete your outgoing logs and the logs that say you logged in as an admin and edited logs. Then sit back for like five minutes and wait for your rating upgrade to come.
That One Level: For some people, hacking into a LAN. Unlike the rest of the game, navigating a LAN means playing cat and mouse with the server administrator and navigating all the hardware - using subnet masks, lockbreakers, and all that jazz. Now enjoy doing it three or four times to the same LAN in order to retrieve several hundred Gq of data, then delete the local copies and upload that data to a server for another corporation to use! Mmmm, corporate espionage!