> Is there a way to bring similar social signals to the online world?
You're assuming that people will react to those signals by stopping (or not starting in the first place). Many of the most disruptive people look for those signals as their goal, because they want to be disruptive.
Think about people who will interpret any variation of "ugh" signals as "oooh, I've found the buttons to poke to get fun noises". If you want to solve this problem, that's a large part of the threat model.
You're assuming that people will react to those signals by stopping (or not starting in the first place). Many of the most disruptive people look for those signals as their goal, because they want to be disruptive.
Think about people who will interpret any variation of "ugh" signals as "oooh, I've found the buttons to poke to get fun noises". If you want to solve this problem, that's a large part of the threat model.