brash_stryker said:
Not desecrating *my* childhood as such, but making so that the next generation who watches the films (in chronological order) will miss out on the impact we had.

It's kind of impossible to avoid having the twist ruined now, anyway. Here's a fun little factoid: I had the twist ruined for me when I was a kid, when a kids' magazine made a joke about it (this was sometime in the early 90's). It didn't stop Empire Strikes Back from becoming one of my top 5 favorite movies of all time (if not the top), not did it keep me from appreciating what a shock it was for Luke's character. It's true that I was robbed of experiencing the shock value first hand, but seeing as that shock value would be lost on repeat viewings anyway I don't really care.

If someone wants their kids to have the same Star Wars experience they did, then they should be watching the series in the 4,5,6,1,2,3 order anyway. And that's assuming that it's even possible for either the parent or child to have not had the twist spoiled already before having seen the movie.