I've played for like 2 weeks not even trying to look legit and no ban. I think it depends on which champions you play( like if you only play xerath and hit every single skillshot it's obvious that ur scripting ) also things like your game knowledge play important role, if your completly new to the game and script the players will see it, it is important to "look like you know how to play" maybe watch how the pros play, like how much farm they have etc. if you have a high cs people will automatically think that you're better at the game and be less likely to report you. Or maybe try sometimes to turn of the evade and let them hit you a few times with skillshots.