halacha - Any Halachic problems with app publishing?

I'm currently in the process of developing a mobile app, that, be'h will have various Israel related feeds. I was wondering if there could be any Halachic issues with respect to including news feeds from the likes of The Jerusalem Post that will feature articles written by Jews on Shabbos.

Also, occasionally, articles have Loshon Hora issues + promote ideas against halacha. Bearing this in mind, would it be permissible to include these news organizations?

Are there any Halachic issues insofar as making my app available to the general public, which would thus inevitably include Jewish people who would use it on Shabbos r’l. (Lifnei Iver or Mesayeia/Mesayeia Ledavar Aveira comes to mind).