we had a thread about this a while back.
Bob acclimates guppies (I think) because they are fed to his mantis shrimp, Bane. Even though they're going to meet their demise with him, it's not nearly as cruel, IMO if they aren't going through shock of being tossed in SW and then attacked. It's more natural, dodododooo swim around, then BAM done.
I agree with the viewpoint posted. I see no reason to do it just to do it.