God is spirit, and those who worship him must worship in spirit and truth."
Now this writer has never met a person, throughout a lifetime of discussing Christianity, who would deny that at least some of the above deviations from God's pattern of worship are sinful.  But, of course, the thing that makes any one of them sinful MAKES THEM ALL SO!  They were not first spoken by the Lord  (Hebrews 2:3).  Their authority derives not from God but from men.