It's funny because in WoW, 'smurfing' was a national pastime for members of decked out guilds. I don't know how many times after a long night of raiding, I had a blast logging onto my level 19 smurf / alt and tearing things up in Warsong Gulch (relieved the stress of being the main tank in BWL or AQ40). Or logging onto my juiced up lvl 39 warlock and vaporizing people in Arathi Basin. Even worse my main(s) could finance a new smurf / alt instantly. My guildmates could help me tag mobs to level to the desired target in a one or two off-raid nights.
I guess all I am saying is all online play has 'smurfing', some worse than others. Seems to me the biggest issue with SoaSE is the very low online population. In a game like WoW, the server pops were so large (at least once they allowed server transfers way back in the day) that no one really cared. Everyone did it. Everyone had to survive it and people found ways to cope. But at least they don't get booted. At least they got to play whenever and however long they wanted.
Personally I would have less an issue with smurfing and more with people who are rude / jerks. While I played alts all the time in WoW, I tried hard to not be an &^%*! to others. It is a slippery slope online to be a jerk. So many people are jerks online since there are no real repercussions and they can say things to someone they would never do in real life without getting punched. Online play is not for the emotionally immature but in games like WoW they are in fact the dominant fraction of the player population. Personally I got burned out after years of dealing with internal guild feuds, betrayals, and in general socially handicapped people that I up and quit.
In the end I had wanted to play online to get a break from the rigors of reality but in the end all the politics and people garbage ended up completely detracting from the experience.
I am sure smurfing has contributed to low online play. But hundreds of people (at best) is pitifully small and will have all sorts of issues. Now you are back to situation like high school with cliques and 'castes'. Woot! I left that &*^# went I went off to college and never looked back.
And for those who say life isn't fair ... yes you are absolutely right but applying that concept to online play in a small community is completely off-base. Real life has far more checks and balances, far more opportunities and at least some modicum of rules and punishments. Online play has essentially zero, regardless of the game.
Ironically at this point the majority of people getting booted probably really are new to the SoaSE and those who do the 'booting' are over-reacting to the mischief and past abuses of various smurfs. If anything the over-reaction / cure is probably worse than the original problem / disease. But isn't that human nature?