I think their main cash cow and form of extortion is the attorneys' fee act. Maybe there is a way to get Congress to limit awards.
I found this article which explains a little more:
In fact, when Congress contemplated the fee-shifting bill three decades ago, it never conceived that 42 U.S.C. §1988 would be used to secure fees in esoteric battles over the meaning of the establishment clause of the First Amendment. The statute gives a court "discretion" to award attorneys' fees to the prevailing party in civil rights cases. Study of the legislative history of the statute reveals that Congress intended this statute to apply to civil rights abuses, including certain race and sex discrimination cases, but not to arguments about whether Judge Roy Moore is allowed to display the Ten Commandments in the Alabama courthouse. During the deliberations on the bill, the Senate penned that "in many cases arising under our civil rights laws, the citizen who must sue to enforce the law has little or no money with which to hire a lawyer."[6] In the recent First Amendment lawsuits filed by the ACLU, the tables are turned. Small school districts and municipalities can either defend lawsuits and risk paying the ACLU's attorneys' fees if they lose, or they can voluntarily submit to the ACLU's view of the Constitution.Even if lawsuits over the establishment clause somehow fall within 42 U.S.C. §1988, the statute empowers courts with nothing more than "discretion" to award fees. In these cases, one would expect courts to withhold awarding fees. Since this is not happening, Congress must take immediate action to clarify 42 U.S.C. §1988 to explicitly exclude lawsuits related to the acknowledgement of God.
From How your taxpayer dollars support the secularist agenda of the ACLU