> Facebook's mobile app infamously does this

Ummm source? I know there has been a bunch of paranoid conspiracy theories about this that are mostly backed by confirmation bias, but I don't believe anyone has actually came out with any proof.

Facebook as denied they are doing this, so I guess you're saying they're lying? http://www.theverge.com/2016/6/3/11854860/facebook-smartphon...