Where does someone get the idea to do that? If in nature there was some way Rats fell into lakes where the Bass were and they got eaten there then yes that would be fine because thats how nature works.
But for some dumb idiot to basically drown a (from what I can see) domesticated rat for his own enjoyment and then having the thought that others like him would also enjoy it, so he posts it on the internet.
Yeah, somethings wrong with that.
I suppose we can only hope someone drops him in a tank full of sharks.