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/
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.
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