Other's have said you could unplug it, but you may also find it to be the easiest way to do certain things, so you could also mute it so it's available in case you want it.

Of course you'd have to trust the mute function, but Amazon is actually pretty strict about honoring their explicit privacy guarantees (like when you push the mute button it's actually muted).

> Is there any way to opt-out of having these in the room?

The ideal way, if it is an option for you, is to opt-out of that hotel altogether. Telling them why may be even better.

I'd say rather than just unplugging it, don't stay at Marriott. Don't encourage them with your money.

You can call ahead or tell them during check in that you don't want it in your room or just unplug it. There is no charge for any of these options. They're very sensitive to customer perceptions and don't want to force anything on anybody.

I imagine you could just unplug it.

Ultrasonics exist to overload microphones but I always thought of then as acoustical coupling of interference which I would think the FCC would frown upon but maybe that's a stretch.

Unplug it?