-----
Tell me honestly that you wouldn't have filed for Declaratory Judgement the moment you learned the patent numbers. Honestly, now. If you want to blame anything for these licensing tactics, blame the Medimmune and Sandisk judgements.
For anybody unfamiliar with these rulings and how they enabled alleged infringers to play hardball and forced patent licensors to do the same, look at [1]. Anyone wonder why the proportion of NPE lawsuits have gone up since 2007 [2]? Well, guess which landmark rulings happened in 2007.
[1.] Michael Donovan, "The Impact of MedImmune, Inc. v. Genentech, Inc.and Its Progeny on Technology Licensing," http://digitalcommons.pepperdine.edu/cgi/viewcontent.cgi?article=1038&context=jbel
[2.] Sara Jeruss, Robin Feldman, Joshua H. Walker, "The America Invents Act 500: Effects of Patent Monetization Entities on US Litigation," http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2158455