Who exactly is defending them? I think every post here is against afk leechers. However, the community(or atleast the majority posting here) knows that if someone is leeching then kick him/her out of the party. If you are allowing him/her to do it then you are being a sucker and can only blame yourself.
You are making such a big deal out of such an easily fixed problem that doesn't require SE to balance anything else.
People multibox...Who cares? That will be their money spent. How can SE stop this? What if someone gets on their wife's cpu and multibox so what then? SE will find and ban them? Seriously any company going this far is setting themselves up for failure and throwing resources out the window.
I repeat. STOP ALLOWING PEOPLE TO AFK LEECH OFF OF YOUR PARTY. YOU ONLY HAVE YOURSELF TO BLAME.