[A party prank? That’s all they have? Amazing if true.]
My guess the gal was coming on to them, and they were forced to lock her in the room to protect themselves.
Sometimes teenage boys act like little boys. If they like a girl they tease her or play pranks on her. That is what it sounds like to me. Just normal teenage horsing around. If locking her in a room that she managed to leave is all they have, then shame on them and shame on this girl for even telling this silly story. Are there any adults on the left or are they all whiny, crybabies?
Maybe she had been drinking and they didn’t want her driving. Drunk Driving is a bigconcern in Montgomery County MD today and it was in the 1980’s also. There is a reason they sat on this for months and didn’t run with it.