If a student has not made a direct or indirect threat to someone at school-- in person or on social media--but displays disturbing behavior such as being an extreme loner <--- Neither illegal, nor particularly disturbing, is constantly hostile to others at school <--- depends on the definition of "hostile." Are we talking a kid who shuts down another kid's attempt to make them participate, or disrespecting teachers? The latter might have some repercussions, if said kid is disturbing class., presents himself in extremely unconventional attire <--- Define "unconventional." Are they cosplaying a Steampunk space wizard from a popular anime, wearing out of date and worn hand-me-downs that no one with a choice would wear, wearing clothing traditionally favored for their opposite gender? Is what they're wearing within school dress code limits? If so, then it's not against the rules. is known to come from a troubled home, <--- Sad, but not illegal. If you're talking teens, then most districts won't have the resources for someone in this circumstance without visible or reported evidence of actual abuse can this person be officially visited or interviewed by law enforcement as a possible danger to himself or others? <--- some folks would call this "harassment," as no laws have been broken without those threats being made.What is the school's guidance department role in a situation like this, if any? Thanks much!