i feel as rule one( and the opening statement..) isn't entirely... "accurate"..
Last July/August i had 2 farm bots running 24/7 , while multiboxing a 5 man team on the same PC, same wow installation path, even traded with the one, team fine when bots got tanked.
October i used honor(ban)buddy while multiboxing ( healer).. and only the healer got tanked on a banwave, all 4 others were safe and usable. and they're all in ONE folder cause i dont got enough diskspace for 8+ seperate wow folders..
Late november before banbuddy closed down, they only managed to snag 3/4 bots, but once again my boxing team ( with a new healer! yay xD ) was left untouched..
just MY experience..