Someone who spams ARAMs to level 30 should not have gold elo in Summoners Rift normals...
I've been playing at low gold elo in normals for ages (based on what I see in games). I just had a game where a player on my team had fewer than 10 games on summoners rift. They had clearly spammed ARAMs to level 30.
I don't care what their win rate was in ARAMs. I've played a lot of ARAM. I know they give some skills, but laning is NOT one of them. The player was hopeless in laning phase and basically made the game miserable (needless to say, I was the ADC and they were the support).
Come on Riot... if someone gets to level 30 purely on ARAMs, you need to fix up the matchmaking somehow... At least make them need to beat intermediate bots before they go PvP on the rift...