Stiffer Rewards for ARAM dodgers/leavers
Yes, ARAM is a game mode for fun and is not a ranked game mode in any way possible, however the minor percentage of players there who either dodge or ragequit whenever things are not in their favor completely ruin the spirit of the game mode whatsoever. Yes, there is a 15 minute dodge penalty, but honestly this is simply not enough to keep the abusers at bay.
Quite simply, if your dodge rate and leave rate combined for ARAMs is above 25%, you should be banned from ARAM for extended periods of time (starting with a warning, 24 hr ban, week ban, etc, scaling in severity). ARAM is not a queue to dodge simply because you didn't get your <2.5% chance of getting one of three champions out of (currently) 121. This will not affect people who play the game mode casually, seriously, or otherwise as to hit at least the 25% you need to be continuously dodging out of pretty much every queue you don't like (the cutoff could quite literally be dropped all the way down to 10%).
The game mode has been around even in custom games for longer than Dominion. It's All Random All Mid not Let Me Dodge Until I Get who I Want All Mid. (besides, LMDUIGWIWAM is a bit excessive for an acronym anyways) Does this mean no-lifers are going to stop making accounts specificially just for ARAM where they only buy the champs they want to play in ARAM? No. But having more than 50% of ARAM queues that go to champ select end up in dodges is ridiculous.
If you're going to queue for an all random game, be prepared to play the champ it gives you, whether you like it or not. And if you don't like it? That's what rerolls and custom games are for.