Someone created a fake account, used my name and committed defamation on facebook. Can i be sued?

[Smokies Hiker]

I wouldn't think you could be sued if you don't even have a facebook account. And it could be claimed that there are more than one person with the same name, so how could it be proven it was you who this person was imitating? With identity theft so prevalent around the world these days, I'd think any attorney would have a rough time winning a case such as this, especially since facebook took it down proves that it was a fraudulent account you had nothing to do with.