I've transferred from numerous bots I have onto my main. It only got banned for botting fletching. Items/gp remained on the main, everything was on the same IP, etc.
And to be realistic, I'm quite certain that they actually do watch your account.
This is also probably how bot farms get mass banned.
And being that we know nothing of their methods, other than their word and the fact that BOT WORLDS EXIST, it's safest to assume that they do infact watch your other accounts closely after getting banned on the same IP.