Yeah has happened to me i didn't even say anything in twitch chat and i got banned for 5 mins mins along with having my first twitch account begin banned from be able to chat in the twitch chat altogether, messaged heaps of the mods + Linus him self and no reply so ended up having to delete that account and start again, still to this day i have no i dear why my first twitch account was banned from the chat in the first place.