It is never the wise course to single out a particular cult for banning. Doing so only causes the govt. to fall into their persecution narrative. I think this is the best approach for dealing with cults:
(1) Outlaw harmful practices, giving no exemptions on grounds of religious freedom. Examples: Make it criminal for any parent to refuse their child life-saving medical treatment in the absence of readily available effective alternatives. Make it criminal for any person in authority - corporate, religious or otherwise - to teach subordinates to refuse medical treatment to the death. Make it a hate crime for any authority to teach subordinates to shun any group of people whether by race, religion, organization membership ... whatever. Freedom of religion stops where it can be demonstrated that their practices are harmful physically or psychologically - without any exceptions. No special privileges in the name of religion!
(2) Make it illegal for any organization - religious or otherwise - to have secret policies or secret rules that only a few at the top are privileged to see. All rules, guidelines, policies, etc that govern the operations of an organization must be publicly accessible. The only exceptions would be for confidential data about rank and file members and information related to physical security measures to deter theft and physical attack, etc. The only organizations that want to have secret rules are those that are intent on engaging in unethical or illegal practices.
(3) Educate the population on critical thinking - from primary school to university. Make it as important as Math! Make this education mandatory in all schools! Avoiding this education by homeschooling is not an option! Also, educate the population about the deceitful and harmful actions of cults - without naming any one. Make this a rigorous, ongoing education campaign. This will essentially inoculate the public against cult indoctrination.
In other words, employ legal measures to make it very difficult for cults to function and grow as cults, thus forcing them to abandon their cult traits or risk the leaders and those enforcing cult traits being arrested for criminal behavior.