It is gratifying to know that the Federal Circuit Court of Appeals has sanctioned at least one attorney for abusing that process in the course of a patent infringement lawsuit.
There are a few dense legal passages in the opinion, but its worth a read if you have the time.
The full opinion in PDF format can be found here:
http://www.cafc.uscourts.gov/images/stories/opinions-orders/11-m976%20order.pdf