Reminds me of a company that I worked for in the past. They tried to sue me for patent infringement long after I had left and started my own company. They of course had no case, but it does cost significant resources for a small startup to fight a multimillion dollar enterprise. All that wasted effort could be better spent developing real products and actually providing value -- on both ends. Not sure why big companies are so afraid of the "little guy" flying under the radar.