This type of behavior is often associated with kittens separated too young from their mother and litter. It may also involve too little contact with people prior to 3 months of age. They display inappropriate play activity, heightened predatory activity, and are slow learners. This is difficult to curtail with standard behavior modification techniques.
A full discussion of treatment is beyond the scope of this venue. However, treatment is centered on “startle” treatment, elimination of fear provocation, and sometimes drug therapy, such as amitriptyline. Discuss these treatments with your regular veterinarian. At the Sanctuary we allow these cats their space and do not force human contact, unless to treat illness.