Correct usage of disorganised vs unorganised

Unorganised or unorganized has several specific meanings that disorganized or disorganised cannot supply, such as

• Not having or belonging to a structured whole (eg "unorganized territories lack a formal government")
• Not affiliated in a trade union (eg "the workers in the plant were unorganized")
• Not organized; being without organic structure; specifically (Biol.), not having the different tissues and organs characteristic of living organisms, nor the power of growth and development; as, the unorganized ferments

For example, a region in a state of civil unrest may be disorganized, independently of whether it is unorganized.

Note: As to implications about previous or future and desired or expected states of organization, or "involvement of an active agent affecting the level of organization", context in specific cases may supply such expectations, but the words themselves do not do so with any level of reliability. For example, a person of organized habits may sometimes be disorganized and vice versa. If we say "Zap sure is disorganized", there is no implication that Zap was previously organized or will be so in future, but instead quite the reverse. On the other hand, if we say "Zap is disorganized at the moment", one might infer that Zap sometimes is organized. Depending on emphasis and tone of voice, one might further conclude that Zap is often, sometimes, or never organized.