I suggest that stating them prominently would help the project. When I read Mago's home page, I downloaded the latest release, followed the "Getting started" process on a local repository, then nearly lost interest when I saw the amount of false errors. If I had first read "here is our goal, with this roadmap, this kind of validation on real projects, and this position toward existing well-known tools", I would have been much more willing to follow the project and accept its false positives.
As a side note, for my first try with Mago, I think its lack of parsing `@property` was a major source of false errors, because the source code it analyzed had a few omnipresent classes that used it. BTW, Mago panicked when I tried to lint another repository... I'll open a issue.