True, but it was not somehow 'out of order' because it was not a rebuttal of the 'whitehat' claims. Given that the article is not primarily about how the author discovered the vulnerability, but the legal problems that ensued, it was not at all unreasonable to point out that acting in accordance with 'whitehat' behaviors and intent is not enough to shield oneself from legal scrutiny. Furthermore, the ensuing discussion, in which various attempts were made to deny this distinction, shows that the point needed to be made!
Poking around to see what kind of data is exposed by a bug is reasonable.
I’d stop there, and I’d suggest people do that, because it makes for a better society for all of us, regardless of the law. What’s that called? Civil disobedience?