o man, i should go to the computer lab and rig up 4 computers all double clienting. if only i could make an AI with a shared brain...

it's hard to say whether it is unfair. I mean, can you ban me for being able to run TB with shaders at 60fps? it's not fair your computer cant process like mine...

There's five possible complaints here: tc, qi, que, game experience, and boosters
TC: Well, a win is a win, so tc gained is tc derserved.
Qi is a measurements of games played and technically they are playing twice the games.
Que: Again, the unfairness lies a lot on deep pockets.
Experience: does it affect your playing experience? not really, besides jealously of aforementioned pockets.
Boosters: This is the only real possible offense I can find. Essentially they are getting double time on it with no pay up. They still have to win, but that double time is a real kicker.

There really isn't too much to call it bannable. I've never done it and before taking a look at it, i was for banning it too. Tough case.