This post was built to influence the largest number of people possible. The title is worded to reach people that don't click with the suggestion that the accepted view in the community is that they aren't spying. It's also by a newly-created account made by a Facebook Ads employee.

The microphone privacy invasion rumor has spread so far without evidence because people are tired of the 1000 other privacy invasions for which there is evidence. They don't care whether or not this specific instance is true. People are tired of FB being openly scummy at every other turn. FB is the least respected tech company for a reason.