, I don't think you can blame someone for a countersuit or defensive pleading. It's only brought up because you are the defendant in the first place.
Anyway, that sounds like an accurate description of Patent Law. I think an argument can be made that they are enforced too broadly (there was a big case recently about whether it's possible to get a patent for a discovery of natural law. The case more or less ducked the issue because they didn't want to categorically say no, but could you imagine if Newton patented "gravity"?).