If you don't want them making your life hell, don't live in the US :-)
If somebody tried a stunt like that in the UK they would find (a) they would get a *large* bill from the defendant, and (b) assorted people (probably *including* the lawyers) would find themselves enjoying a short stint at Her Majesty's Pleasure :-)
If prosecuting your client's case means you end up a defendant, I can't imagine many lawyers being prepared to take the money ...
Oh - and we have a case like that going through our courts at the moment. The general consensus seems to be that the lawyer involved is heading for disbarment - that he's committed professional suicide.