There's no hidden motive here. It's interesting work, but usually this type of research is done on malware samples and the like, and not "regular" apps. That's

There's no hidden motive here. It's interesting work, but usually this type of research is done on malware samples and the like, and not "regular" apps. That's why I'm curious if the authors should fear legal ramifications, and if so why (or why not). I'm mainly interested in answers for the US, Germany/EU, and Switzerland.