PSA's shown during Nick shows can come from either Nick or the cable or satellite provider.
My cable provider regularly runs tons of PSA's.
Is your friend certain that the PSA wasn't run from his local cable or sattelite provider?
Honestly, I just don't believe Nick would do something that dumb. In a hyper-competitive business that lives and dies by ratings, this would be suicidal.
they are that dumb. (see president commercial the emphasises Reagan acted with a monkey)
It is easier to ask forgivness than ask permission.
They try it and if no-one complains, they run with it.
I watched a program on Nick "news" where an adult was facilitating discussion amongst kids. The moderator brought up the subject of gay parents and "why does anyone think that's wrong?" then continued making the case for families headed by gay parents. It was intentional, they had a chance to edit that out, but of course they left it in...Nickelodeon chose to present that subject matter in that way to kids....that was more than a year ago and the 'agenda' has only become bolder.