Parler lacked the most basic security measures that would have prevented the automated scraping of the site's data. It even ordered its posts by number in the site's URLs, so that anyone could have easily, programmatically downloaded the site's millions of posts. Parler's cardinal security sin is known as an insecure direct object reference,
WHY IT MATTERS: security has become central in our age of digital transformation. Yet, it seems, most people are either unaware of basic security principles, or not willing to invest time or money to do it. And I am not even talking of doing it *well*. Just implementing proper security measure. In this case it affect Parler, which in itself I don't much care about (they deserve it for such a stupid mistake). But their lack of security impacts their users privacy as well. And that includes potentially millions of people (in the photo, 68000 video have been geolocated - too bad for keeping your anonymity ;-)