Yea, this seems to be sort of analogous to companies who check whether you have a rooted device in order to take some kind of action (usually preventing the software from running). If that's a shitty thing to do, then this is, too.

Software should not be in the business of trying to (badly) guess whether the user is the right sort of user, based on inexact signals from the operating system. As others pointed out, the false positives will be annoyed, and the true positives will sidestep your efforts.