US Army AD 2007-20012, I had a Drill Sargent (who was secretly gay, but that's another story) who was so fucking good at his job. During AIT when all the soldiers where in class the Drill Sargents would, with their "master key", go into everyone's room for inspection. The idea was you were not there to hide your bullshit and they got a lot of people this way. Kicker was they had 2 soldiers with them so they could not be accused of theft or what not. So one time here I am a night shift guy woken up at 12 noon to walk with my Drill Sargent to inspect rooms.
First few rooms not much. I mean he destroyed them pillows, covers, shoes, cloths anything not tied down was thrown ever where and for no fucking reason, all the rooms were clean. Then about 45 mins into it we got to one room. DS did his usual shit slinging everything across the room like a fucking tornado, then he got to the shoes. See we had several sets for different reasons (dress shoes, shower shoes, PT shoes, Work Boots, etc.) So he liked to look in them and them sling them across the room when he found nothing. However this time he found a key in the toe of this poor bastards PT shoe.
He immediately looked at me smiling from ear to eat. So he tries the key on a few things as most of our storing furniture had locks on them. Nit eh Dresser, Nit the night stand, ahhh the desk. So he pops the lock looks inside slinging everything he finds. Unfinished letters, some letters from family, medals/ribbons, a PSP, and finally he finds a phone. He opens it buts its locked, he fucks with it for a minute and boom got it, stupid fuck made his code 1234.
SO with phone unlocked he searched calls, text, pictures everything. FOund out he made several calls after hours when he was suppose to be asleep, even found pics from the local stip club somthing he was allowed to be at until he got phase 6, and then he hit gold. Text messages from another soldier, this one female, about next time they were going to meet up, how many cigs and liquor they had left, talk about finding away to get more condoms, ect and all half these messages where when he was suppose to be at school, in the middle of the duty day.
He actually got kicked out of the MOS and had to take whatever shit job the Army gqave him, I heard it was a cook.
TLDR: Drill Sargents are like fucking detectives and they will eventually find your bullshit. When they do they have almost God like power in deciding your future, possibly for the rest of your life (Dishonorable Discharge).