I believe your data (well not necessarily "your" data because facebook doesnt know who you are), but some data created by you can be accessed by facebook via ot

I believe your data (well not necessarily "your" data because facebook doesnt know who you are), but some data created by you can be accessed by facebook via other people's profiles simply by way of hearing your voice through the other person's app. This can be true for any app with access to microphone. I have also started fresh but I believe the problem goes well beyond just deleting your profiles and apps.