you weren't downmodded for agreeing with the story, it was because your comment was substance-less. nobody here wants to read "me too"-type things, it's just a waste of time.

if you've got something to add to the conversation, by all means, do so. if you've got nothing to say but "me too," just mod the story up and move on.

The way this site's values are carried forward is the older hands show the newer ones how things are done around here. That sort of community maintenance might happen anywhere, on-topic for the current submission or not.

But heck, if you're really hellbent on not listening to advice, go right ahead doing what you're doing. It's possible your account's karma will wind up in negative numbers and then get deleted, but that's hardly the end of the world, I guess.