The only lawsuits I've heard about are SL residents trying to sell products made by SL content creators. 

As Garee has said, there's no way to import Poser Obj files or textures in any usable fashion for SL. BVH files are about the only things that can be stolen from outside SL.

There is money to be made by Poser content creators that take the time to use how to use the 3D resources inside the SL world. It mostly means starting from scratch, though texturing skills transfer much more easily because it's only a matter of adjusting to different UV mapping.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon