So any of us is vulnerable at any time? Any company with a burr up its butt can decide to bring a civil case against me and as long as on its face it is sustainable enough for a trial, I'm toast.
It costs just as much money to bring a suit against someone as it does to defend yourself. Unless a corporation has something to gain by suing you (money, publicity, protecting it's interests - as the WTS is doing), then they won't.
Unless you have undisclosed millions hidden away somewhere, I wouldn't worry about it...
GGG