I'm surprised my comment led to so many responses. I must say a few things in retort to some of the replies. I play EXCLUSIVELY ARAM. I have over 6,000 games, though I haven't checked the total lately, could be over 7,000 now. And as I said before, I've been playing since season 1 and own all champs. I still believe bans are pointless and remove part of the fun of ARAM.
First off, people who enjoy ARAM like myself, and there are plenty of ARAM only players, are typically SUPER casual. We have no aspirations toward Esports competitiveness. There are no Esport gains that can be made in ARAM. It's a giant team fight in 1 lane for a reason: Because it's mindless fun. Just like URF. In fact, you could easily refer to it as URF light. That's reason enough to leave ARAM the way it is IMO. If you are getting annoyed because the other team has Veigar, then you have missed the point of the mode.
The second reason for no bans addresses OP verses Annoying. Sure Teemo can be annoying, but isn't some of the fun, learning how to beat him down? And I don't really believe in OP right now. The most recent balance changes have destroyed much of the power that the top 10 OP champs used to wield. I'll bet anything most of you aren't aware of who the most OP Champs are in ARAM right now (and it changes constantly). Guess what? While you're banning Lux, Ez, Veig, Teemo, Sona, Yi...people are winning more with Rumble, Mord, Shyv, Kassadin, Panth, Nocturne and Skarner. As some Champs get nerfs, others will always rise to fill that void. Furthermore, I have a secret. Shhhhhh, quiet...now get real close to the screen...listen carefully to this whisper...If at least 4 of you, blow past the tank, who btw is building Tank and cannot damage you, and aggressively target the backline, you can win any ARAM game! I know right!? I've been playing for 8 seasons and remarkably, everyone still engages the Tank when they initiate! Blow past him and go blow up the Sona, Veig, Lux you wanted to ban so badly! Guess what? If you blow them up, you don't have to worry about banning them! Problem solved! Write one sentence to your team, and if at least 3 of the have half a brain, you have a great shot at getting that ARAM win, if that's what's important to you. That sentence is, "Hey, we should probably target ____". How difficult is that? As far as banning annoying Champs? What Champ isn't annoying really? In the right hands, every Champ can be annoying, and every Champ has a counter. Yes, even in ARAM.
Third, Tanks positioning and aggressiveness win ARAM. Catching people out of position or dangling too far from the team is key to ARAM, as is aggressively trying to capitalize on this mistakes. And the more Tanks you have the better off you are in ARAM. But that's not who people are banning is it? So what would even change? The bans would enable someone who dislikes playing against Teemo under any circumstance, even though many of us see him as more comic relief than a serious Champ, to ban him EVERY game? Doesn't make sense to me. I like beating him down as much as I like wreaking havoc with him.
Lastly, and perhaps most importantly, because this one drives me nuts. Real ARAM only players know that "ARAM only accounts" are a fallacy, perhaps even a myth, and if they do exist, they work no better than a full account. Period. End of story. I could literally write a list of variables that nullifies the success of supposed ARAM only accounts, as long as a Novel. I even tried to make one to see if it would work. If you get only the Champs you are strong at, it doesn't even give you that much more of an advantage, if any! If you say, bought your top 14 Champs for ARAM only. Well, each week there are 14 free Champs, all of whom may not be on your owned list, and that makes your chance 50/50 of coming close to even validating your ARAM only account. So you say, well my chance was below 50% of getting my faves before I made the ARAM only. Likely, it was not. Not that many people have full accounts, and those that do typically do not play smurf accounts. They play their mains. ARAM only is a supposed shortcut that does not work. Attempted by players looking for shortcuts to winning, and complained about by players who need to make up an excuse to validate why they lose. Furthermore, the Champs on one ARAM account will not be the same for every player, so now you've added another batch of variables that nullifies intentionally limiting your Champ base as an advantage. I'm betting I can beat your ARAM Yi with my ARAM Rumble in a match more often than not.
So, IMO, limiting Champs through bans to avoid things that don't really exist, caters to bad players. This is how League slides down senseless rabbit holes. By listening to people who lose a lot, instead of players who know how to win. PS, there is no ARAM ELO. Only SR. Winning in ARAM is completely different. It requires different builds and different strategies. If I see you building jungle starting items in ARAM, I know it's gonna be GGEZ 9so keep doing that if you want).