@Toni ******
The troll is you. If you are less than X days (varies between 180 <- Thailand or 185 <- Germany): then you are not tax citizen, of any given country.
If you are 100 days in 3 different countries, and
*****
days in a fourth, you most likely do not pay any taxes in any of them.
However Germany for example introduced a "taxed at source" tax, so even people staying only a few months can be taxed on the income they generate INSIDE Germany - but not on any other income.