We dont hate noobs perse. they can be useful ;-)
Though I think its safe to say that we are wary of noobs. Because you could really be a multi-account 'puppet account' in disguise. The scam is a medium level player (not the experienced ones who have far too much honour to stoop to that level) joins a game, then signs up a new separate account (the 'noob') and joins the game too. Instant ally, patsy, help you in the game player. Done stupidly (playing the noob as an extension of his primary country) is obviously apparent, but say, if the player is a thesbian, schizophrenic, or autistic, (completely silent, rarely sends msgs) then it becomes harder to tell. Of course the only way to tell would be to track how many times a middle ranked player wins or is doggedly assisted by a new player. Freakonomics tells us that the numbers will reveal cheaters always.
The problem is false positives, for instance, I have been in games where I recruited a noob to do my bidding with the promise of protection and survival in a game where he was about to get clobbered (I delivered by the way) after it was clear I was going to win, I delayed the ending so that my henchmen could clammer up some more centers, which probably really pissed off the second place player... sorry). I was accused of multi-accounting. But I knew I was okay and dismissed the accusations because I knew that my henchmen was not going to be someone coming from the same IP, heck domain, heck timezone, so I was not too fussed about it.
It does mean, though, if you are in the habit of recruiting noob henchmen, then you should try to avoid them being siblings/housemates using the same computer, else you may be in risk of really showing up as a multi-accounter, or at the least (in the above cases) a meta-gamer which is frowned upon, though not a strictly bannable offense (I believe right?)