A defense argument for XenForo and the anonymous employee would probably focus less on denying disclosure outright and more on narrowing what actually happened, what legal significance it had, and whether it truly constituted a reportable GDPR breach.
The strongest version of that defense would likely look something like this:
The judgment never conclusively establishes exactly what data was disclosed by the source versus independently discovered through Nardello, OSINT, surveillance, public corporate filings, social media analysis, or other investigative methods.
Much of the allegedly “private” information was already inferable or publicly obtainable:
Sebastian Bond’s association with Nest and Glow,
Yuzu Zest corporate records,
Poole/Bournemouth location,
aliases,
and forum/software connections.
The source may have been confirming hypotheses rather than disclosing entire protected records from scratch.
“Purchase orders” may have been partial screenshots, metadata, or limited confirmations rather than full internal account exports.
The hosting/IP references described in the judgment are not necessarily proof that raw server logs or protected internal databases were disclosed.
The source repeatedly pushed the plaintiffs toward formal legal process, including an NPO, which cuts against the theory that XenForo was intentionally bypassing lawful disclosure requirements.
Once the NPO was obtained, XenForo formally complied through court-supervised process exactly as its stated policy contemplated.
On the GDPR side, the defense would probably argue:
Art. 32 does not impose a strict-liability standard where any informal employee communication automatically equals systemic security failure.
The court did not make findings that XenForo knowingly authorized disclosure.
The “rogue insider” theory remains plausible because the judgment never identifies management involvement.
Art. 33/34 notification duties only trigger once a controller becomes aware of a personal-data breach likely to create relevant risk thresholds.
There is no judicial finding that XenForo corporate leadership knew in 2023 that unauthorized disclosure had occurred.
Sustained communication alone does not prove the employee was continuously disclosing protected personal data; some exchanges may have consisted of opinions, public-source analysis, or strategic advice.
The defense would also attack causation and materiality:
The plaintiffs already had substantial evidence identifying Bond before the NPO.
Nardello had already concluded Bond was “eminently plausible” as the operator based on independent investigative work.
Therefore, the source may have accelerated confirmation rather than “revealed” an otherwise unknown identity.
As for the 2021 disclosure discussed in paragraphs [78]-[80], a defense would likely say:
the judgment does not establish that XenForo leaked that material,
only that an old NPO disclosure later circulated beyond its original litigation,
which could have occurred downstream from the original recipient rather than from XenForo itself.
So the core defense theme would likely be:
At most, this was an informal and possibly unauthorized confirmation process occurring alongside an already advanced independent investigation — not a deliberate corporate scheme to unlawfully disclose customer data or circumvent legal process.
