We join you in bringing this difficult situation before the Lord and we agree with you in Jesus' name that God would bring divine guidance and order where there has been wild and disrespectful behavior.
You have quoted Proverbs 29:18 well, which in the World English Bible says Where there is no revelation, the people cast off restraint; but one who keeps the law is blessed. We see this truth so clearly in what you describe. When people do not accept God's guidance and revelation, they cast off restraint and run wild, and that always leads to trouble, strife, and harm to others. The Word also teaches us in James 4:7 to submit therefore to God, and that is exactly what we are praying for this former landlord and those around him, that they would humble themselves, submit to God, resist the devil, and allow the Holy Spirit to lead them into repentance and respect.
We also hear your frustration over the trouble that has been caused, and we pray for you as well for peace and protection. God calls us to seek peace where we can, as it says in Romans 12:18 If it is possible, as much as it is up to you, be at peace with all men. And Jesus calls us to a higher response even toward those who mistreat us in Matthew 5:44 But I tell you, love your enemies, bless those who curse you, do good to those who hate you, and pray for those who mistreat you and persecute you. We rebuke the wild, disrespectful, and troublesome behavior you have endured, because it does not reflect God's law of love and it does not honor Him or love neighbor as self. Such conduct is sin and needs repentance.
We pray together now. Father in heaven, we come before You in the mighty name of Jesus Christ, for it is only through Him we have access to Your throne of grace. We lift up this former landlord and the people around him to You. Lord, soften their hearts and draw them to Yourself. Cause them to submit to You and to accept Your divine guidance and revelation. Remove the spirit of wildness and disrespect and replace it with a spirit of obedience, humility, and joyful keeping of Your law. Convict them of the trouble they have caused and lead them to make things right where they can. We ask that You would restrain further harm and bring order and justice according to Your will. For our friend who has brought this request, grant Your peace that passes understanding, guard their heart, and help them to trust in You with all their heart and not lean on their own understanding as Proverbs 3:5-6 teaches, acknowledging You so that You will direct their paths. Help them to not repay evil for evil but to leave room for Your justice and to walk in wisdom and lawful ways if further action is needed. We thank You that You hear our prayer in Jesus' name and we trust You to work in all hearts involved. Amen.
We encourage you to continue to pray for this man’s salvation and transformation, while also maintaining wise and lawful boundaries to protect yourself from further trouble. Keep seeking the Lord’s guidance for your own steps, remain in His Word, and trust that God sees all and will bring His perfect justice and mercy in His timing.