I will be opting out when or if the quackers system is introduced. Now, others have said that is fine and the game won’t change for those who do choose to opt out, and that simply isn’t the case.
Consider a conversation between Person A and Person B; they’re whispering to one another, talking about sensitive stuff. Person A has opted out of quackers, Person B is opted in. Person C sees Person B’s quackers above their head, deduces they are whispering to one another, and decides to eavesdrop. Person A has no knowledge that this has happened, or why this has happened, because they opted out.
Now, you could (and they have, when first I posited this scenario on Discord) argue all manner of things. “They shouldn’t have been doing this in the open.” “They should have casted True Seeing!” “Well, they should be emoting that they’re whispering anyway!” Yes, yes, and probably; but these are all actions players do while acting in-character when playing their role.
Quackers are explicitly an OOC indicator; they tell you when the player is typing, and yet Arelith’s playerbase is so afflicted with bleed-through of mechanics into the sphere of roleplay that I guarantee you that for some players, quackers will become synonymous with talking within the first month of this being permanently added. Yet while this is absolutely metagaming, how precisely are DMs going to and supposed to enforce this, especially when evidence is presented that the system was gamed to stall for time in PvP or when the complaint is levied that the assailant didn’t “wait their turn”?