You can express disagreement loudly with the power in place while still following the laws and not causing "issues" in the way most people think about issues.

You can express disagreement loudly with the power in place while still following the laws and not causing "issues" in the way most people think about issues. Whether visa holders have such right depends on the countries however; I don't believe France has such restrictions (https://www.service-public.fr/particuliers/vosdroits/F2190 https://www.service-public.fr/particuliers/vosdroits/F2190 does not mention "political activities" as a valid motive for refusing entry). I think some other countries do restrict political activities for non-citizens.