I am truly sorry for pointing this out, I really am, but this has got to be the worst spelling ever in human history (including the internet). Actually, I think that such a marvelous word could only have been designed on purpose, or you're a genius when it comes down to humor. Either way, it made me laugh quite hard, and for that I'd like to thank you. Definitely worth some Karma
Edit: just for the record, the correct spelling, while being pronounced pretty much identically, is "necessary"
I don't mind smurfs in casual games, I can see the reason behind it (as Hack already pointed out it just takes a clan tag and people think you're some sort of uber-pro who'd kill each and every enemy with hands tied to his back, blindfolded and without ever touching the mouse - I daresay some sort of Chuck Norris avatar). Still, like all things in life this has two sides. People who smurf a lot should be aware that in more way than one this destroys peoples trust into the community. Being kicked just because you happen to belong to a clan is irrational and comes close to some sort of twisted superstition - but exactly because of that you shouldn't give in to it. Let people choose for themselves, instead of just denying them that choice by disguising yourself. Myself, I'd leave a game where the host kicks someone for that reason. Just host your own game, then. It can't be helped that some or even most people online are jerks that make the wrong choice.
In the long term smurfs will simply accomplish that noone will trust anyone he doesn't know personally, everyone could be a smurf, resulting in a sort of paranoia at worst. The multiplayer community is small enough as it is, don't make it even worse. I happened to be in quite a lot games that almost completely consisted of skilled veteran players (myself excluded), so it's hardly like there are no alternatives.
Being doubled or having a fed opponent suck, true. Nonetheless it's the greatest compliment you can receive, because people think you to be too skilled to be defeated by "fair" means. And often enough I've seen skilled players prevail in situations like that. After all, they didn't earn that fearsome reputation by luck and sheer chance alone.
Bottomline is probably that I'm taking this way too serious, but aside from that: stop smurfing, be proud of who/what you are and stick with it.