This isn't that bad of a thing to do.
Dogs are worthless, they add nothing good. It's not like it matters if some puppies drown; lots of things drown, or die an even worse death, yet nobody gives a stuff until a video of it gets posted on the internet.
When there's a video of it on the internet, everyone gets all tough guy acting and acts like the whole thing is the worst thing in the world ever.
"OH MY loving GOD THAT BITCH NEEDS TO DIE FOR WHAT SHE DID I WILL KILL HER MY SELF IF I HAVE TO!!!!!!!!!!!!!"