That's not incorrect, but at best you get grounds to audit the data and publish a more complete picture, not just handwave away their data as inherently worthless.
If they refuse to publish the data (in a way that preserves privacy of users but otherwise is sufficient to evaluate the methodology and legitimacy), then you second guess. But tossing it out without that (especially when it's very clearly in line with all the other ways to look at the site) isn't justified.