Clearly we are far enough beyond the Hippie era of the 1960s that beards and mustaches are no longer closely associated with rebellion. And just as clearly, there is no Scripture forbidding the wearing of facial hair. Nevertheless, even secular authorities admit that there is a subconscious aversion to men with beards and mustaches by the general population.
People simply trust clean-shaven men more.
It seems to me that we lack Scriptural basis for stating that beards and mustaches are a sin. Facial hair on a man is no longer indicative of rebellion as it was in the 60s. While it is appropriate for a pastor to set a standard against facial hair, this has not been my practice. Actually, many of our customs pertaining to holiness are intended to draw a distinction between the sexes and to reinforce our position that a man should look like a man, and a woman should look like a woman. To follow this same line of reasoning, the facial hair on a man is unique to his masculinity, and his beard or mustache further sets him apart.