...kind of, it depends on the type of spoiler. I really hated knowing who Impa was in SS...it kind of ruined that plot point for me, but knowing all along kind of made me enjoy and really be fascinated with the character throughout, so I suppose it wasn't a completely terrible thing
But I hate it when people spoil endings to anything. Especially if there is a big twist or something super important that changes everything at the end. It ruins my personal experience just a bit, but it doesn't completely ruin the movie/game/tv show for me, because I am still able to enjoy it for its aesthetics, plot, characters, music, etc. If all it had going for it was that one thing that shocks everyone, then it really had no sort of substance, and probably wouldn't have been a very enjoyable experience otherwise.