I disagree entirely with this idea and it will never be implemented.
I'll tell you why, and if you disagree with any of my statements (logically, I will ignore any illogical statements coming from you and brand you as stupid if you even suggest an illogical disagreement) than feel free to debate me on them.
Auto readying allows for one single player (or players) to play (or grind) while the rest do nothing but leech.
While this doesn't sound bad, you must consider the effects this will have on the game and its players:
First off, players will be able to leech to a high level with extremely little actual play. This may be done even at current time, but at least the amount of effort to BE THERE to hit ready shows you have the smallest amount of deserving of your level (though like I said the smallest).
If you understand that this will cause a massive amount of "newbs" being high levels (not my main point, but one nonetheless), than you may read on. Can you tell me why hacking's bad? In my opinion, hacking is bad because it allows a player to unfairly reach a level without putting in the time and effort to reach it legitly. I would like to mention that afk leeching causes the same effect, quoted, "it allows a player to unfairly reach a level without putting in the time and effort to reach it legitly." In other words, I feel you're cheating the system if you are afk leeching, because at least if you're normally leeching you're putting in the time to leech, instead of just entering a room as a level 1 and coming back a level 124.
Is this fair? That some players have to grind for hours upon hours to reach that level that you got overnight? Have you ever played RuneScape? Botters are severely looked down upon because software does the work for you while you do something else, or sleep; this is the same concept -- except another player is doing the work for you while you do something else, or sleep.
I'd like to point out as my last (but not final) point that it could be used to unlegitly grind guild points -- and guild points are what keeps the game alive for some maxed out players (and even some who aren't maxed out). Imagine, you wake up Sunday, you start BoutCheetah, you make a guild, you recruit 7 friends on a new account, all level 1 and you grind 221 (or whatever you may want) all day. All those 7 accounts have to do is have boutcheetah running in the background, meanwhile you're racking up 8x as much guild points. Is this fair?