This is a parity of a NatSec threat. Any base that is legitimately secret would disallow it’s personal from using apps like this. And that data is trivially replaced by satellite photography. Non secret bases are supported by hundreds of “Third Country Nationals” that do everything from trash collection to serving food in the chow hall. TikTok is not a natsec threat unless our military personnel are posting natsec information to it. Pretty easy to solve that problem and not ban it for everyone.