Take it from a Lawyer...
Somebody *Did* try to sue the Devil. In a written opinion (may have lost and then appealed, been a long time since I read the case), the court making the final decision noted that it could NOT exercise personal jurisiction over that Defendant because, among other things, the Plaintiff had not proven than the big d had been, or even could be, properly "served" with the Complaint.
"Lawyer-Proof" is a lot like "bullet-proof". How "lawyer-proof" do you want? The problems with the older Rem 700 fire control groups are well-documented, described, detectable and all that. I would *expect* the new and improved versions to be *sufficiently* lawyer proof for any reasonable case.
One case I remember vividly involved a teenager (I think) who unloaded the R700 while on one side of a horse trailer, with the muzzle pointed at the trailer instead of the ground. The bullet went through the thin sheet metal on both sides, of course, and killed his own mother.
YOU, my friend, are the item that needs to be "lawyer-proof!!!!" Muzzle direction is most critical when you are *doing* ANYTHING to the firearm, whether you believe it's loaded or not.