Well I've checked it out....
The damage done, the effort expended lead me to think that this was a professional 'hit'.
The classic shakedown phrase: "You really should update".... Hint: spend money.
Such a phrase is atypical of a teenage hacker. A teenager says, "Gotcha!" (I'm so smart.)
This player is demonstrating by his act exactly the extent of his power and further steps that he can take: total erasure of the site's files. Again, these words of 'concern' are most unlikely to come from a teen.
Between Netster and this...you're on the radar.