Trivially which is why VPN's have boomed in the UK since this was brought in.
An entirely predictable result given how easy it is to install a VPN vs having to verify yourself constantly to sketchy third parties on every site that has adult content (note: adult meaning adult not pornography..a lot of non-porn adult stuff get caught in the net).
There is a reason that google and apple aren't screaming about these laws.
That pretty much is the reason - they want to become identify brokers for the entire online ecosystem and if it costs them under 18 users they don't really care, they aren't typically the ones with the money anyway.
An entirely predictable result given how easy it is to install a VPN vs having to verify yourself constantly to sketchy third parties on every site that has adult content (note: adult meaning adult not pornography..a lot of non-porn adult stuff get caught in the net).