Laser disc was a niche market item (I think that some of these boxed sets had less than 1,000 copies). Because it was a niche market item, a lot of things happened with corporate consent but that still placed them under the radar of the mainstream media.
Even still, the boxed set that contained that Bugs cartoon was re-issued without that short (I have the original release).
There was a full side of "politically incorrect" cartoons in a couple of the boxed sets (a disc held an hour on a side so that would be 1-hour of rare cartoons, 7 or 8 shorts per boxed set).
Now that the MGM library (which Turner owned) is merged back with the Warner Brothers library it is easier to do a full release of shorts but there are some titles I just don't EVER see them releasing.
The Private Snafu wartime WB cartoons are public domain (having been drawn for the US government) and have been compiled on a top notch DVD. They are drawn by the same staff, written by Dr. Seuss, and geared for a distinctly adult audience (in ways that would never have gotten past the Hayes office).
I also recently got the wartime Disney cartoons on DVD (this set got postponed twice and I was worried that it would get issued briefly before being recalled).
Another great set you can get are the Tex Avery cartoons on VHS. You can get those unedited, including all the explosions causing black-face and all that. I have 4 videos of his great cartoons. It has everything from Screwy Squirrel, Droopy, Spike, and that Confederate Wolf that always whistled that funny dixie song. "Real cool maaaan."
Luckily I have a copy of Song of the South that I got in London about 10 years ago. I need to get that thing transferred to DVD so I can keep a good copy of it. I remember seeing that when I was a child (I'm 27 now). I think it's a great show and a wonderful story.