The maladaptive behavior of isolated children is difficult to change

maladaptive behavior

Yes, alcoholism is a form of maladaptive behavior. Alcoholism is never good for people.

A response that, while it may have been appropriate in a similar situation, is not appropriate in everyday life. A former soldier diving under a table when a car backfires would be a maladaptive response. Maladaptive behavior refers to behavior deemed inappropriate to a particular situation.

Yes it can. Maladaptive behavior depends on a variety of causes and stressors. If it's a transient state, once the stressors are removed, acting out may well also disappear. The question here is one of causation. Transient physiological pathologies (for instance) are as likely to cause maladaptive behavior as chronic psychological issues. Look to the cause :}