I alt tab box 3 toons usually. It is not that hard to double tab to hit a social key (with /pause timers) on the 2 alts. Then I go back to main DPS for a few, then alt tab and hit a second set of socials on each alt. Yes, it is not as efficient, but it is not skirting any rules nor using any third party program to enact game play. I cannot say that I would be able to 4 box or even 6 box. But it still is fun and I can kill most stuff in game. I don't usually box while in group with other people, because when they do something un expected it usually messes me up. But its way better than having some random player in group that likes to tag the incoming pile of mobs, or heal the puller (with a train), right before they cover tracks. So, if you are willing to 3 box or 2 box with mercs , then you don't necessarily need ISB.