IDK even where to begin with this.
The difference between a raver and a prophet apparently is a StartHere.html, and there's not even that. It's just files. Lots of files. And meme images or whatever. I swear, this is just some guy and his cause. Or girl, I dunno. Whatever. Everybody got a mission these days.
I'd call the cafe and tell them to trash every last thumbdrive, but they're all innocuous. Why bother.