This is an awesome idea ngl, I don't see any clear negatives to implementing this. Might not be easy though. Issue is that it may not be possible to implement.
As peoples have said, the 3 second rule is not specifically for typing. So basically if we added this (which is also nearly impossible because you would have to write a plugin that would have to detect if you are still typing on your keyboard or not) any CT that sees someone stand up without this "icon" would instantly shoot said person. Would add more toxicity that is not needed to the server. Also, smart T's that rebel know and use this rule of 3 seconds to catch a CT off guard that is too close.-1
The “standing up to type rule” isn’t meant for only typing in chat, this could be through steam DMs, this could be just alt tabbing real quick, etc. This rule is meant to allow prisoners to do something really quickly, whether that’s looking at your phone or turning down your music in the background to hear the warden better, it could be for anything. Adding this “icon” would not only be nearly impossible to do but it would cause way more freekills with the reasoning “I didn’t see their icon”. In my opinion there’s already enough icons floating around players heads and this would just add more clutter.
o ur accoubnts already gone lmaoThis would do more bad than good.