Legit accounts wont be banned. i botted a lot and only accounts i botted got banned. i have a high level main that hasnt been banned even though i played on it while botting others on the same IP. And about the IP Being flagged thing id say if you log into the new IP with your main account that is flagged. This would in turn flag that IP because a flagged account is using it? just what i am thinking i dont know if thats how it actually works.
Also (THIS IS JUST MY EXPERIENCE) Every time i have used a IP address to bot i have been banned within 2 days. all bought from different people.