I grew up with parents that lumped older R-rated films in with PG-13 ones.
(PG-13 was a new "in-tween" hard-R films and normie PG stuff... so my parents just retroactively lumped all the old soft-R films in the same group)
-So that meant Ghostbusters, CaddieShack, Aliens [in theaters], Die Hard, The Fly, Revenge of the Nerds, Police Academy, Dead Heat, Terminator, The Fog, The blob, ... etc... heck, [i]anything and everything John Carpenter[/i]...

Watching unrated films when 7 years old was a bit of a coin-toss, though.

Long story short, if it was a saturday night movie, I could watch it if I could stay awake and quiet.

Staying completely motionless for the duration of the film was just a thing we did.