In the NIVAC Revelation you state, "Scholars debate whether “sexual immorality” in Revelation 2:14 refers to literal prostitution, such as the prostitution sometimes conducted in pagan temples, or to a spiritual adultery that leads astray from God. Sexual immorality was rife in the eastern Mediterranean—no less common than today. Nevertheless, in view of the frequent use of the image in the Hebrew Bible (e.g., 2 Kings 9:22; Jer. 3:9; 13:27; Ezek. 16:15–36; 23:7–35; Hos. 1:2; 4:12; 5:4; Nah. 3:4) and especially in view of the “prostitute” later in this book (Rev. 17:1, 15–16), the spiritual sense seems more likely here and in 2:20."
I understand the point you're making. I wonder though, in consideration of things like Galatians 5:19ff, and Eph. 5:1f, Col. 3, 1 Thess4:3, 1 Tim 1:10, or 1 Cor.5:1-6:18, and considering that the thrust of the Rev. passage seems to be somewhat more focused on the teaching (without excluding the deeds), it would seem that some of our modern grace heavy teachings in the church today, which deny that a "saved" person can be condemned, fall into this category of teaching. Is our view (modern mainstream church) of grace focused on the gift and not the giver, the blessings and not the curse? Have we fallen into this teaching of Balaam, all the while claiming grace, and refusing to see our idolatries?