article seems to be mostly referencing the keller school district than the town. kisd spans about 9 cities, so you’d have to look at demos for all of them.
edit: i will take this opportunity to plug books unbanned as well, an organization that provides resources to help access books for certain age ranges from libraries that believe in access to information.
the data dumps are unrelated to signal, just part of the millions of americans who get their info hacked from websites each year. these people are just under scrutiny because of the recent scandal.