I thought there was a lot of gray area in there, depending on the country. If you go to a conference or a meeting in some countries, for example, you are obviou

I thought there was a lot of gray area in there, depending on the country. If you go to a conference or a meeting in some countries, for example, you are obviously "working" while on that visa, arguably remote, and it's often the case that is done on a "tourist" visa for many countries. I thought this was the case for most EU, and it's the case for some South American countries. Some countries obviously don't allow that - I recall I needed an invitation for China and South Africa, for example for some conferences, although I think they were still tourist visas.