[EldrickOnIce]

There is, in my mind, a distinct difference.
Disney is negligent for not taking appropriate measures to insure the safety of their guests.
The parents (father) showed an innocent and understandable lack of judgement that resulted in a horrible tragedy, and one they will quite possibly blame themselves for being so 'stupid' every single day for the rest of their lives (i know I would), but are absolutely not negligent.