An indication of what? It is impossible to know why a user pressed an arrow button. Any meaning the user may have wanted to convey remains their own private inf

An indication of what? It is impossible to know why a user pressed an arrow button. Any meaning the user may have wanted to convey remains their own private information. All it can fundamentally serve is to act as an impoverished man's read receipt. And why would you want to give trolls that information? Fishing to find out if anyone is reading what they're posting is their whole game. Do not feed the trolls, as they say.