According to the app researcher from Hong Kong, only the Android version seems to be doing the data collection of system libraries from users' devices to the servers without their consent. From the app, it has the component known as Global Library Collector and there doesn't seem to be a way to opt-out. The guilty pleasure may be the same as the Chromium Embedded Framework that powered various services like Steam and Epic Games Store which have some components that collected users' data although the company that manages Facebook was in hot water before over privacy violation and yet, the app on Android itself does the data collection even deeper.
Obviously, closing the Facebook account over privacy violation is bound to tear things apart. You still have current friends to keep track of as well as the Groups you're in and the Pages you've liked. There are even those who manage their Pages as well like they're public figures.
Who knows what Facebook will do to the data they've collected through the Android app? Plus, the lawsuits were already thrown to tech companies like Apple and Microsoft over privacy violation and to Microsoft and Facebook, it may seem that the backlashes and lawsuits have not been enough like the on-going famous privacy breach through Windows 10 as well as the extended privacy violation concerns over other products like the Xbox One Kinect, Cortana, Skype Translator and even Office 365. Microsoft had a reason regarding data collection for AI stuff but I don't know if Facebook has the proper reason for collecting data through their Android app.
It's a later news than the one about Microsoft's recent actions through the Xbox One Kinect, Cortana and Skype Translator and I don't know if Facebook will learn from their mistakes and put a stop to this illegal data collection. Also, the app on Android is a battery drainer through data collection and removing things that collect data may save you the bandwidth, disk space, and even battery life.
