That is where the storage comes in. Most likely the data from the drives is being dumped to a local NAS device with a limited capacity - more then likely a consumer level NAS sitting under someone’s desk. When it fills up it probably requires an IT person to get involved, and then they have to decide if they are going to dump data or do an unscheduled upload, being greedy they will probably wait for it to upload, then they have to start over or resume copying data from your device, so if it’s a honeypot giving endless data then you can imagine them making thee or four attempts before giving up and waving you through. Meanwhile they have hundreds of terabytes of your random data to store and index for 75 years.
All of these comments seem to be written as though the side effect of trolling federal agencies is everyone being mature, recognizing that you pulled a great joke on them, having a good laugh, patting you on the back and sending you on your way.
Based on prior stories I've read - trolling pissed off people with any form of Authority could end up very very badly for anyone doing this.
Aside from them just out and out confiscating any electronic device they like, they could detain you for a long period of time, they could put you on no-Fly lists (and then good luck ever flying into/within the US again), they could put you on extended screening lists (and so, every time you fly then on - again, kiss goodbye every electronic device you posess every time you travel, again). If you're a foreign national, or even if you look vaguely foreign, you might find yourself deported/denied entry/locked up for a while during the deportation process.
That's before they even get motivated enough to be malicious - I'm sure if they wanted, they could gin up enough of a case of "obstruction" or "wasting police time" if they can find any evidence (or even anything that looks like it could be hint of intention, like posting on HN), which even if it never goes to trial can still make your life a living hell, cost you your job, and a huge amount of money defending.
