Also, the patent reform bill[1] that was featured not so long ago isn't about holding companies, it's about making the trolling process harder. One of the provisions is requiring the "real party of interest" to be exposed in the litigation, so a shell company litigating on behalf of microsoft would have to get microsoft involved with it. The other big thing has to do with validity and pleading. In many cases the lawsuits are brought about without any valid claim, and are just used as a harassment tactic to get small companies to pay up their fee instead of going through an expensive and painful legal process. Under the bill, the discovery process is halted until the patent is interpreted, and it forces the patent holder to be more specific about which claims are actually at issue.
None of the things put in that bill seem like they would affect the likes Johnson, had this case even been about patents, as he has legitimate and valid patents, and he himself is the real party of interest.
[1] https://www.eff.org/issues/current-legislative-proposals-pat...