I feel for the family, but have to agree. At some point, whether it's a 2-year-old, 6-year-old, etc., the screen's gonna give, even with longer pins.
"Window screens are made to pop out for fire safety reasons, and do not serve as abarrier to prevent children from falling out of windows." (Christoffel KK. How can we prevent children from falling out of windows. Presentation at the APH conference, Chicago, Illinois, January 23, 1985.)
At any rate, I would not call it a frivolous lawsuit. What do you think? Was it frivolous?
Certainly, in retrospect I would not have brought it - the lawyers spent a small fortune on the trial, presumably reimbursed by the parents, who could ill afford it.
Maybe it's easier to get away with silly lawsuits in other places in the country.