i was about to say the same, the seller is from singapore, so to them, its normal iirc, but i agree, making ANY animal fight for pleasure is WRONG
Depends on what you mean by fighting, watching rams butt heads is a common pastime in some places, where people will place bets.
I don't like gambling, but that's way more preferable than, say, rams fighting- to the death.
I'm disgusted at this though, it's obvious that whoever is selling this thing doesn't really care about animals. Still, if you would like to see it disappear, just keep complaining with reason.
"Users are like a virus"
EDIT:
Wait a sec, that's just a box with a divider, I wouldn't consider that cruel unless you leave the fish in there... or lift the divider. Stuff like that is good for getting reluctant males to breed, for example, by leaving them near another male, it gets them kinda jealous.
But as a permanent home, no.