Comment by ascorbic

Yes, this is really little different from shutting down a whole forum because you received a single DMCA request. If anything it's even more of an overreaction, because a DMCA request could be followed up by legal action, whereas a data subject can't sue. All they can do is report you to the regulator. The regulator is unlikely to do anything if it's a frivolous request. Even if it's legitimate, their first action them would be to send a warning.