Ahh, fun times.
Had one where they recalled the whole squadron on a Saturday, and then loaded us on busses to go over to the auditorium. OSI was out there loaded for bear, with their vests and goofy utility belts, looking like they were about to go on a SWAT raid. Had the K-9's out and everything.
Sat everyone down in the auditorium, and then did some theater where a very short OSI dude hopped up on stage and started asking if anyone knew someone doing drugs. A couple young enlisted folks raised their hands, and they were led to the back of the room. Heard rumors later that some of the folks who raised their hands were "plants," that had been asked previously to step up. Guess the thinking was that no one would want to be first, but once some kid saw someone else raise their hand, then that would embolden others to do it. Don't know if that bit of kabuki theater actually ended up in anyone being caught or not, but I doubt it. Don't remember anyone disappearing from the squadron afterwards.
Spent the rest of the morning sitting around the auditorium sipping on bottled water, BS-ing, and awaiting my time to piss in the cup. They didn't even have the decency to serve us breakfast afterwards.