Sticking someone else with the bill

I wrote a while back about school districts that spend close to a half million dollars in legal fees to attempt to ban Gay-Straight Alliances in their schools. They always lose because the law is very clear that if any after-school clubs are offered (such as a bible club), then all clubs must be permitted. Districts also know they are going to lose. So why spend a half-mil to accomplish nothing except annoy gays for a while rather than spend that money on something like, oh, actually educating students? Because they know their insurance companies will reimburse the expense. Hopefully soon an insurance company will start quoting the exceptions for frivolous lawsuits.