Does disabling Siri disable this behaviour though? What if you're not close enough to the device at the time to see the indicator? That's the bit the worries me in terms of mic use.
On Android I can toggle the camera and mic OS wide, and per app. When I'm not taking pictures or a call I turn them both off OS wide using the quick toggle buttons. On iOS I can only find options to disable them per app which doesn't give me as much confidence.
> What if you're not close enough to the device at the time to see the indicator? That's the bit the worries me in terms of mic use.
The odds are stacked against the attacker. Unless they can also figure out whether you're looking at the screen or not, they're rolling the dice every time they attempt a recording. As they make more recordings, the probability of being discovered approaches 100%.
Adguard seems to offer blocking only, whereas Privaxy "is able ... to inject scripts as well as styles into HTML documents", which was the feature my comment expressed interest in.
The readme goes on to say: "Privaxy is also way more capable than DNS-based blockers as it is able to operate directly on URLs and to inject resources into web pages."
In this case "incorrectly" is what makes it possible to find it, search-engine-autocorrect-stupidity aside. The name is obviously a combination of privacy and proxy. There's another one called Privoxy which works on similar principles.