However, think of trying to legitimately sue Microsoft, or Apple or Google for using your patent. You have their bills to worry about too and they can out-lawyer almost everyone. This is no doubt loved by the largest corps, it does nothing to stop trolls but makes it much harder for a real person /entity to sue them (with tens of billions in the bank)
Edit: Imagine the first day in court, months after the other side's billing has started: you see 16 lawyers on the [Google's, MS, Apple's] side and have a heart attack! 16X$400 an hour (on the low side) X 5 hours = $32,000 for half a day, just to show up in court.