That's pretty horrible, but when you think about how many bettas go to live in college dorms where their bowls will have anything from pee to beer be poured in it, or left completely neglected with only top offs if they're lucky (with dechlorinator if they're SUPER lucky!) it has less of an impact, at least to me personally.
No matter what, if bettas are going to be sold in cups (whether the cups have blue water or not, whether the cups are the size of a urine sample cup or half a yogurt container) the presentation gives this message:
"Bettas can live in unfiltered, unheated vessels of water. Bettas can stand to be left uncared for. Bettas are different from other fish."
If people would see bettas (if only females) occasionally with other fish in a proper setup, this might change. Many fish would be suitable, such as small rasboras, cherry barbs, certain tetras, and certainly bristlenose plecos or otos.
If only people would see bettas in divided tanks in with the other tropicals, this might change.
Every time someone "rescues" a betta in a cup, they support the practice of selling bettas in cups. If no one bought them at all, they wouldn't sell. And the way they are shipped to the store is awfully atrocious, as well. At least the way I understand it, they are shipped in teaspoons of water:
http://www.bettafish.com/showthread.php?t=23985---------OMG that's awful!
Every time someone applauds a store for deciding to "store" their bettas in bigger cups, they are not helping the cause. The ultimate goal should be for stores to stop selling bettas in cups. Will that day ever come? I hope so, but I'm not sure.
So while this is terrible, to me it's more like the last shots in a series of time elapsed photography...this is ultimately how most bettas will end up, sadly, and ditto for comet goldfish kept as pets.