Your original reply was to a post saying: Sending an email on vacation is one thing. Setting up residency is something else entirely.
Those do not have the same intention. In the first case, the email is incidental to the vacation. In the second case, the purpose is to work (which defies the claim to be "on vacation" in the first place).
No-one is confused about whether they're going on a foreign vacation (taking vacation time, telling their colleagues they're not going to be available etc) and handling a few emails vs. setting out to work remotely from another country that might have a superior climate. The suggestion that these are the same thing based on observing that both involve work email in a foreign country is pretty obviously ridiculous.
If you tell the immigration officer at the border that you're planning to work remotely with your tourist visa, they're going to put you on the first plane home.
As I said, it is a matter of degree.