Many Christian groups back in the day denounced secret society groups discouraging their congregations to avoid them.
Any group that keeps secrets, especially under penalty of punishment for revealing those secrets is a cult and very damaging to the person in that cult as well as family members and friends.
Proverbs 12:22
"Lying lips are an abomination to the Lord, but those who act faithfully are his delight."
Proverbs 19:1
"Better is a poor person who walks in his integrity than one who is crooked in speech and is a fool."
John 8:32
"And you will know the truth, and the truth will set you free.”
2 Corinthians 8:21
"For we aim at what is honorable not only in the Lord's sight but also in the sight of man."
God's way is open honest communication as well as accountability, with out this those who keep secrets could hide their sins, even encourage others to sin and get away with it.
Proverbs 6:16-20
"There are six things that the Lord hates, seven that are an abomination to him: haughty eyes, a lying tongue, and hands that shed innocent blood, a heart that devises wicked plans, feet that make haste to run to evil, a false witness who breathes out lies, and one who sows discord among brothers. My son, keep your father's commandment, and forsake not your mother's teaching."
Those who are open and honest have no need to hide or keep secrets, their trust is in the Lord not in the false perceptions of us by others.