Really? Tell that to the victims of serial killer & sodomite John Wayne Gacy. He appeared normal to them in every way, which is how he lured them to being trapped and, ultimately, sodomized, tortured and murdered. Looks can deceive most people.
It seems many trads have an elitist attitude on appearance and socio-economic positions of people. I'd rather trust Our Lord in discerning a man's soul:
"Judge not according to the appearance: but judge just judgment." - Matthew 7:24
I had never heard of this Gacy, so I did a search.
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Apparently, he did not appear "normal in every way", as some of his victims were actually abducted, gagged, or tricked. His victims were almost exclusively teenagers, who are not, as a rule, experienced enough to make good judgements.
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The photos of him show him to have a weak chin and to be overweight, as well as having shifty eyes, looking down and away from the camera, on an occasion when he would normally look straight at the camera (on the occasion of meeting Roslyn Carter, the President's wife).
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He was a mason. He played the clown for "fundraisers", and it was noted that "
some professional clowns noted the sharp corners Gacy painted at the edges of his mouth are contrary to the rounded borders that professional clowns normally employ, so as not to scare children." https://en.wikipedia.org/wiki/John_Wayne_Gacy.
Now we know that the more one matures in the Christian faith, with the Gifts of the Holy Spirit ever growing in us, the more we are able to discern good and evil.
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Besides the above post is essentially a collection of writings from Scripture and the Saints, noted for their wisdom.
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A good man can wear rags with dignity. The eyes are the mirror of the soul.