Robert_Charlton - 5:13 pm on Dec 12, 2011 (gmt 0)
The best response for your friend is to invite the lawsuit.
tangor - FYI, my friend is a lawyer, and he wasn't offhand dismissing the letter as trivial. I had to remind him that I was unable to give him legal advice. ;)
I could only advise him on the history of what was going on in this area, and I took pains to point out that my view was incomplete.