That's exactly it. DEFENSELESS. In terms of understanding this term right (I'm a german gal), "defenseless" does NOT mean armed to the teeth only. As I understand the term "defenseless" it means without shielding either...or lag of skill to avoid dangerous situations (e.g. highwake-tactics).Plus, in my opinion, it says a lot about someone's personality attacking defenseless ships without any reason.
And to be honest, as far as it concerns me. Flying in a shieldless ship in a potentially hostile environment is reckless and negligently.
But hey...maybe some of the poor souls in syria are enjoying the thrill of dancing on the streets with a sign around their necks telling: "FRAKK OFF ISIS"