On Arch you can easily uninstall Linux.
The fun part is that there are even legit reasons to do so, the by far most likely one being that you want to use a different package that provides you with a kernel, such as linux-lts or linux-hardened. Definitely know what you are doing in that case though!
But it was true! Just not in the way that was claimed: They had these litterboxes in case they had to barricade in the classroom for extended periods of time due to a school-shooter that the police didn’t bother to stop quickly…
So yes, it really is a fucked up story, just in a very different way from what republicans claimed.