Can Orthodox Christian laity prevent people from promoting perversion? Certainly, not only ordinary laymen should be engaged in this, but also state authorities, whom God commands to do it.
This decree goes back to the Old Testament commandment:
“If a man lies with a male as he lies with a woman, both of them have committed an abomination. They shall surely be put to death. Their blood shall be upon them.” (Leviticus 20:13)