That doesn't change what I said though. The "non-practicing entity" part got too much undeserved criticism. It's the submarine patent part that is really problematic.
I don't see the problems with such non-practicing entities. They serve a legitimate purpose and advance the goal of patent laws by paying existing patent holders for their patents and suing companies for patent infringement. In this way, companies that would otherwise have to take on risks to mount an expensive lawsuit themselves can receive ready cash. If such non-practicing entities are outlawed, the inventors would never have been rewarded, and companies like Apple will likely not be held accountable for their patent infringement. Conceptually these companies can be thought of as debt buyers or debt collection agencies.