Q82. Should those who show by what they say and do that they are unbelieving and ungodly be admitted to the Lord's Supper?

No, that would dishonor God's covenant and bring down God's anger upon the entire congregation.1 Therefore, according to the instruction of Christ and his apostles, the Christian church is duty-bound to exclude such people, by the official use of the keys of the kingdom, until they reform their lives.