Here’s what Fnord posted in 2020
Why Are We Creeped Out?
Webster's defines a "creep" as "a strange person whom you strongly dislike" and "an unpleasant or obnoxious person". It also defines "the creeps" as "an uncomfortable feeling of nervousness or fear". Thus, feeling "creeped out" is a response to a potential threat; even an ambiguous one. This reaction could be adaptive, something humans have evolved to feel; with being "creeped out" as a way to maintain heightened vigilance during a situation that could be dangerous.
The Creepzone
If people actively avoid you, if they try to get away from you, if they don't welcome your presence, or if they are openly hostile toward you, then they may be thinking of you as "creepy".
While there seems to be no official definition for the "creepzone", it's meaning may be inferred. Thus, when a person is obviously being avoided by others in social situations, then it is likely that the person has been "creepzoned"; that is, others may experience "an uncomfortable feeling of nervousness or fear" whenever that person is around. But why could this be?
Who's a Creep?
According to Dr. Frank T. McAndrew Ph.D. in "How We Decide Who's Creepy", people perceived as "creepy" are likely to:
• Be males more than females
• Behave unpredictably
• Display non-normative "body language" and emotional behaviors
• Display unusual patterns of eye contact (i.e., always or never).
• Have non-normative hobbies or occupations
• Persistently steer conversations toward peculiar or unpleasant topics
• Possess non-normative physical characteristics
Related to all of this, females are more likely than males to perceive some sort of sexual threat from a "creepy" person, especially if that person is male -- less so from younger or shorter males, and more so from older or taller males.
Parallels to Asperger's Syndrome
Coincidentally, males are more likely than females to be diagnosed with Asperger's Syndrome, the symptoms of which include (but are not limited to):
• Unusual behavior (i.e., advanced or archaic vocabulary, contact avoidance, endless talking, rocking, selective mutism, stimming, too loud or too quiet, whining, et cetera)
• Unusual patterns of eye contact (i.e., forced gaze, little or no eye contact)
• Persistent focus on peculiar or unpleasant topics of conversation (i.e., special interests, conspiracy theories, bodily functions, personal experiences, sex and sexuality, et cetera)
• Non-normative non-verbal and emotional behaviors (i.e., easily distressed, jumpiness, prone to meltdowns, sensitivity to criticism, stimming, little or no "body language", et cetera)
• Non-normative physical characteristics (i.e., awkward gait, physical clumsiness, rigid posture, et cetera)
• Non-normative hobbies (i.e., collections of what is commonly considered "trash", obsessiveness toward one hobby to the exclusion of social activities, et cetera)
• Non-normative occupations (i.e., unemployed, in a job that might commonly be considered demeaning or disgusting, or in a job requiring little or no social contact)
• Poor grooming, fashion sense, or hygiene (i.e., acne, unkempt or greasy hair, too much cologne, unshaven, body odor, wearing damaged or wrinkled clothing, mis-matched clothing, et cetera)
• Aggressive or intimidating behavior (i.e., standing too close, clenched fists, abusive or insulting language, expressionless voice, et cetera)
• Insulting or demeaning behavior (i.e., correcting what others say, derailing the topic of conversation, demeaning or ignoring other people's emotional distress, interrupting, et cetera).
Thus, the classic symptoms of Asperger's Syndrome would seem to inspire a "creepy" feeling in others, and be a one-way ticket to the "creepzone" for the Aspie. Unfortunately, the fact that more females than males perceive a "creepy" person as a sexual threat means that most "creepy" people will be males; and the fact that Asperger's Syndrome is diagnosed more in males than in females means that most of those "creepy" males will likely have Asperger's Syndrome.