Here is what it says about volume one:
"The films are all presented uncut, in defiance of the killjoys who have insisted on censoring alleged "violence" in the versions shown on television. Warner Bros. is obviously testing consumer response with this set. Although the erratic selection includes many classics, purists will argue (correctly) that it offers neither a fair representation of the directors' oeuvres, nor anything approaching a coherent history of the characters or studio style. (Nearly half the films were directed by Chuck Jones; only three are by Bob Clampett, and there's nothing by Tex Avery or Frank Tashlin.) But it seems petty to
carp about omissions and biases when the discs offer excellent, uncensored prints of some of the funniest films ever made in the U.S.--or anywhere else. (Rated G, suitable for all ages: cartoon violence) --Charles Solomon"
volume three:
"The cartoons are also presented in their uncensored forms. When they were presented on TV, some scenes and dialog were cut to avoid angry mothers writing in. Seemingly innocuous things as a Elmer choking Bugs were excised (in Hare Do) and the networks even zoomed in on frames to remove objectionable material (the word "cigarette" was cut out in such a way in A Hare Grows in Manhattan.) Some cartoons had little or no cuts, while others like Hillbilly-Hare had several scenes removed. Happily the cartoons on these discs are all in their original un-edited forms."
volume four:
"This is the market that Looney Tunes - Golden Collection, Volume Four is aimed at: animation connoisseurs who want to see the shorts in their original versions and looking as good as possible. So, much thanks to Warner Bros. for treating this essential part of their catalogue with as much respect as it deserves. These are the uncut classics, warts and all. Sometimes politically incorrect, sometimes racey, always funny."
volume five:
"Plus, these sets are the only way to currently see these wonderful old cartoons (Merrie Melodies are represented, too) in their original condition, with all of the racey (and sometimes racist) jokes intact, not cleaned up for television and mass consumption by children. These comedy films were always intended to be just as appealing to older viewers, and fans of the art form like myself tend to prefer to see them as they were originally shown. We're smart enough to do our own clean-up, thanks."
I couldn't readily find any info on Volume 2, but because all of the others are uncut and uncensored, I'd assume that one is as well!

"Once there were brook trout in the streams in the mountains. You could see them standing in the amber current where the white edges of their fins wimpled softly in the flow. They smelled of moss in your hand. Polished and muscular and torsional. On their backs were vermiculate patterns that were maps of the world in its becoming. Maps and mazes. Of a thing which could not be put back. Not be made right again. In the deep glens where they lived all things were older than man and they hummed of mystery."