I can think of an easy way for them to avoid being sued.
Via Free Beacon:
Pennsylvania Democrats are outraged after a bill was passed that allows gun rights groups like the NRA to sue localities for passing laws that violate state law.
Many such Democrats said a provision forcing localities that lose lawsuits to pay the legal fees of the plaintiffs is particularly objectionable.
“This is a dangerous provision that threatens municipalities’ financial stability,” Rep. Madeleine Dean (D., Montgomery) told the Philadelphia Inquirer.