- Buys or borrows a laptop / phone / whatever from somebody with an authorized private key
- Downloads an authorized private key file from a sketchy forum (maybe hacked from an unwilling target, maybe willingly shared by a free-speech advocate)
- Uses a VPN over HTTPS to visit websites in countries where age checks aren't legally mandated (and non-compliance is implicitly or explicitly encouraged for economic or ideological reasons)
In the future, you'll need a signed certificate with your PII/KYC to access the internet and get an IP address. China is already on the way there and the west is warming up to this approach.