One of the ideas I have, but will not have time to do, it's to make a site or browser extension to allow users to send extra content, reactions, memes, pictures, etc on Hacker News submissions and comments without having fear of the downvotes.

There's many many times that I wanted to post a funny reply but I'm certain that I'd get many downvotes from it.

Also a very old idea of mine :) But in part that's what reddit does. Also a general-purpose geographic forum, where you can leave notes to people in a certain area ("I lost/found this item around here"/"beware of the crazy old lady leaving poison for dogs in this area"/"beware the child toy in the park catches on children hands; make sure they keep their hands above the seat at all times"). I also thought about tinder before smartphones had finger touch screens.

Which goes to show execution is everything.

It's forbidden on the Hacker News. Many things go unsaid due to fear of down votes.

It's forbidden on the Hacker News