Here's one from the mid-late 1980s, Snake the Drug Dealer.

I'm about 95% certain that's Malcolm Jamal Warner, but I'm not finding his credit for this PSA anywhere.

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I don't know if its anywhere online but I would love to see the psa where a brother and sister are getting ready to watch tv and the brother trys to yank the sister out of the chair and yells THATS NOT FAIR I TURNED IT ON GET OUT and then a second later says hey wait a minute maybe theres room for both of us for some reason when I was a kid a thought the brother;s hissy fit about the chair was funny :lol: