This could easily backfire, especially when patent trolls have an army of high-paid lawyers. Just the threat of having to pay millions of dollars for the plaintiff's legal fees means that you had better have some really good representation as well. And if you lose, you end up paying all of your own legal fees as well as the army of lawyers working for the patent troll. In most cases, it would just be cheaper to settle which actually strengthens the capabilities of patent troll racketeering.
Isn't it cheaper to settle in most cases anyway? Currently, the ones willing to fight a patent suit must have huge amounts of cash. Smaller companies don't have the resources to pay millions to defend a patent lawsuit to begin with. When Newegg.com beat that online "shopping cart" patent, did they win any money? Most of the other online retailers had settled earlier, and Avon and Victoria's Secret had lost even larger verdicts in court.