well earlier you definitely could get banned. i've probably received at least three temp bans (maybe four) and one packet spamming permaban but that was a really, really long time ago. furthermore they almost annihilated their botting playerbase at one point before retracting their bans for members only or something. ae is still massively anti-botting (even though they don't publicly talk about it as much now).
having said that... yes, you're right that generally speaking, they won't ban most people now (in 2019) but it's not entirely impossible either so i wouldn't be too blatant in public rooms... and obviously if you do bot, you do so at your own risk