Sidetracked a bit but last week I was in the UK. I tried to visit a website (not porn actually, just private messaging on BlueSky) and it asked to verify my age. Initially I thought "Meh... OK... let's see the process" which then lead to installing an app maybe (I'm not sure tbh as I was in rush). Clearly I didn't want to do it because the DM was potentially urgent (scheduling to meet someone ASAP) ... so what did I do? I switched from my browser to my VPN, connected from Austria, refreshed... no age verification. It took me a grand total of 5s to bypass the system.
TL;DR: maybe you can actually escape even though you are convinced you can't.