My understanding is that, absent an explicit supporting legal structure, it would default to being treated as a general partnership. Which means that partners in the DAO would be liable for its activities, and could be held responsible in whatever jurisdiction they happen to reside. Thus, instead of having no jurisdiction, it could be answerable to up to as many jurisdictions as it has members.

I would ask: who wrote the DAO code? Someone (or several people) tested, developed and then deployed the code.