NCC621 said:
I read that TNG bloopers were suppressed because Stewart and Spiner hated them.
The TNG bloopers were suppressed because, over several decades, the now-famous TOS bloopers (made to entertain the cast and crew at the annual Christmas and/or wrap parties) that were once screened only at large, selected Star Trek conventions of the early 70s, were
illegally bootlegged and distributed as if they were public domain. (Someone at the convention, entrusted by Roddeberry to mind the reels, did the urgent copying deed, we assume.)
As those "TV Censored Bloopers" shows gained in popularity, many actors began to be paid quite well for the airing of their hilarious workday blunders, but the Star Trek actors - some of them almost broke during their lean and hungry years, and being told they were typecast -
received no royalties whatsoever for the blooper footage that was out there. And there was no way to compensate them for loss of royalty, especially since their series contracts didn't compensate them for the syndication of TOS itself after the third repeat. (Kelley and the "gang of four" received lump sums during ST V to compensate them for the regular series, but nothing for the bloopers since they were now public domain by default.)
It was the Screen Actors Guild who tightened the rules on bloopers, but yes, the TNG cast (and their agents) were very uncomfortable with TNG bloopers going the way of the TOS blooper reels.
The bloopers included on the ENT DVD sets were probably covered by the actors' original contracts, with royalties going to all participants.