Q: Are upvotes and downvotes the same as on other sites?

A: No. Other sites see downvoting used as a way to signal disagreement or dislike of a post. Here however, downvotes aren't used unless the post is offensive or improper.

Sorry, I'm new here, and I'd like to know what could guarantee this? reddit had rediquette, other websites also have a general thought that it should be that way, but it often isn't. Is there anything in code?

Thanks for this list btw!