The usefulness of this given how finnicky wireless chargers are is questionable, over USB seems more plausible as even a USB condom wouldn't protect you from this.

I imagine sitting in an airport, charging my phone and using the free WiFi. I see a friend showing their new Nikes on Instagram, then start browsing the Nike website myself. After a few minutes I look up and see the information screen opposite me showing an advert, "20% off Nike today".