So here's two of the worlds largest economies out - I can't imagine it's much harder in the "rest" of the world.
Unfortunately in much of Eastern Europe you can't purchase a SIM card without showing an ID, for sure you need to show an ID here in Romania. They've changed that relatively recently, I'd say during or just after the pandemic. I don't know about how things stand in neighbouring Bulgaria. In fact, a quick web-search confirmed that Bulgaria also has the same policy.
> You will be required to show an ID document in most stores.
[1] https://maukatravels.com/bulgaria/prepaid-sim-card-bulgaria/
I assume the legal basis for all of this is "terrorism!", which would imply that cheating on this could result in... nothing enjoyable.
what i meant.
> I assume the legal basis for all of this is "terrorism!
the "low hanging fruit of terrorism" aka nuisances, but yea
So what you'd do is to forget the whole SIM and only connect to WiFis in those bungaloos or wherever you're staying in your travels.
You usually know if a country's wifi will be a pain in the ass by going to a Starbucks and seeing their wifi portal. Some places you need nothing and some they want a birth-certificate/blood-sample
I wouldn't bother thinking about this in Europe already due to the free cross-border roaming. But for instance in Southeast Asia, it was pretty common that all the bars and whatnot had a WiFi that was granted to you with a mere password, although guesthouses' WiFi was to my memory linked to your room registration. And there were still a lot of WEPs and whatnot, and the cyber crime is booming there anyways so the requirement to disclose your details sounds like a security theater anyways.