[r2_pilot]

You may not be trying hard at all then. The first thing I thought was to clone your voice to use in real-time translations. I can probably think of several others mentioned in comments below, but this is a 100% always-useful never-nefarious(assuming perfect translation not being maliciously used) application.

[brigadier132]

This tech makes me not even want to speak.

[Wistar]

Yes, I have, just now, been thinking about how few, and featureless, syllables I can utter to determine if an unknown caller has a legitimate reason for calling, such as a large-delivery driver, medical lab or other real call.

It seems the best tactic is to make the caller do as much of the talking as possible.

Or use a generic cloned voice to interact with unknown callers.

[beretguy]

This tech makes me not want to have a YouTube channel.

[figglestar]

Use the tech to speak and hide your real voice.