Its possible, as Jagex has stated that if you bot one account, other accounts are in danger of being banned.That being said, i have never heard of this happening.Short answer would be.Yes its possible,but very unlikely.
I have never seen a case of people getting banned on both accounts if they just bot one, but everyone here says it is possible so, it maybe is, proceed with caution and use a VPN if you can.
Best way is to use private scripts, as jagex is looking for patterns, and when alot of people use a certain bot they find that pattern and do a ban-wave to scare people
So if you care about your account be sure to use a private script, as a scripter around to make one or you could just pm me
I've recently been banned on an account that I botted for gold only. It's funny it was only a 2 day ban and the account has been botting for around 7 weeks before it finally got hit. All of my other accounts are not banned though.