From the study:

>longitudinal follow-up of patients revealed a wide spectrum of maladaptive behaviors that started in childhood, including emotional lability (frequent outbursts of crying and/or aggressive behavior in the absence of obvious triggers) and maladaptive behavior, particularly in social settings (Table 1).

Other maladaptave behaviors I got from a google search:

Avoidance

• not making eye contact during conversation
• speaking too softly or not at all
• not asking questions when you need more information
• avoiding social interaction

Self Harm

• cutting, scratching, or burning skin
• picking at scabs or wounds
• pulling out hair, eyelashes, or eyebrows
• self-hitting or banging your head
• refusal to take needed medications

Anger

• temper tantrums
• other violent behavior

Substance Abuse

• alcohol
• prescribed drugs
• illegal drugs

Maladaptive daydreaming

• engaging in extensive fantasy in place of human interaction or participation in real life.
• daydreams that can last hours at a time and involve intricate plots and characters that keep you going back.

Sexually Maladaptive behavior

• having unprotected sex in a situation that calls for protection
• sexual aggression
• doing things you don’t really want to do
• putting yourself in unsafe situations

Its a mix of conditions/behaviors recognized in individuals with variants in this receptor, examples: "labile emotion", learning disorders, anxiety, depression, ADHD, personality disorder, volatile behavior, etc., Table 1 right most column