The last Oscar show I watched was, I think, 1973. It was the one where David Niven was speaking and a guy, sans clothing, (this was during the streaking fad)ran in front of the live camera. Niven than quipped, “There’s a fellow showing his shortcomings”, or something like that.
I always thought it was a set-up, planned in advance, because the camera only showed the guy from the waist up.
I didn’t watch the Oscars even as a kid in the 70’s. I sure don’t want to waste time doing it today. And I don’t think a streaker from back then would think there’s enough public attention today to waste his/her time either.
I worked on the production of that year’s show, and the preceding year as well. I was up in one of the press rooms when it happened, and I don’t think it was pre-planned. Although the Academy was watchful for some kind of incident because the previous year was when Sasheen Littlefeather showed up to accept Marlon Brando’s award. That was stressful behind the scenes, lol.