on a scale of one to ten, how worried should i be about getting banned for multi accounting if i'm using both accounts on the same device at similar times?

i got back into an old alt account i had made for lair space (before hibden was a thing) and i want to use it as it's own distinct account, different lair/clan theme, etc., but i am a bit worried about getting hit with a ban. would i be safe enough using two devices, even if activity times are similar (and just not sending items/dragons one way/in one sided transactions, etc.), or does it... not really matter? like do people only get banned for multi-accounting if someone reports them for it?