This is a very odd question but I'm just curious. I was in my dorm yesterday in college and lately our WiFi has been just really sluggish and I'm assuming the reason is that there is about 5-6 WiFi printers broadcasting their signals (they run on the same frequency as WiFi routers do they not?) so I typed up a message in Microsoft Word telling the people to turn off the WiFi setting on their WiFi printer (and then printed it 10 times to give them incentive to search how to turn it off if they didn't already know because we've already had numerous e-mails sent out about this and the RAs have been talking to us about it during house meetings). Now when I did this I assumed it could be tracked even though I wasn't sure exactly how it worked but didn't really pay any mind to it because a) I was doing nothing illegal and b) the RAs have told us to turn them off numerous times yet they still didn't. But now someone printed off a log of the printing wrote me a long message in pen on it about how I "hacked" their computer and it is a USB printer not a WiFi printer so I'm just curious is there anything illegal about what I did? Or is it a possibility that it is against some university policy?
People use the word "hack" a bit too loosely. I'm guessing you did nothing more than search for printers and press print. I'd be very surprised if that was illegal but it may well breach your university's policies - you'd do well to talk to the RAs that you refer to.