I’ve never completely understood this, but I think the answer would probably be “no,” although I’m not sure. Usually when I leave the house I turn off wifi and just use mobile data (this is a habit from my pre-VPN days), although I guess I should probably just keep it on since using strange Wi-Fi with a VPN is ok (unless someone at Starbucks is using the evil twin router trick . . . ?). I was generally under the impression that mobile data is harder to interfere with than Wi-Fi, but I could well be wrong and my notions out of date. So, if need be, please set me straight. 🙂
I don’t know how likely that is. But I was a bit too quick in my judgement, on public networks a VPN does ass significant protection to HTTP connections. Not really on home networks, mobile networks or well-secured public/office networks though.
I honestly don’t know how much risk your data is at after leaving the tunnel. Luckily most things are HTTPS now.