My opinion is that multiboxing is unfair , but i judge multiboxing a nerd who has in front of him 3 laptops an he plays all of them.
The biggest multibox i've ever seen was on Proctyon server , and i was amazed that the population increased to a breath-taking world record of ... 11 players.Explanaion was that a guy was playing on 5 accounts at once , 4 Dromedaries and a Sabre - Powertrading like no other.
About the idling thingy , i usually select the nearest dockable base to me and hit f2.As i am always bothered by my mum with silly stuff like "bring me that" , "do this" and "do that" means i'm close to my pc and i can get to it anytime so when in the dock range , i hit f3 and wait to get kicked out , or when i am trading i usually just move along tradelanes , at each passing , i dock another trade lane , but everytime , I - And i advise that everybody should do the same - Always press "Y" and look up on chat for bumps.