I agree with Jimmy about the meaning of "En todas partes prohiban fumar", it's an exhortation and I think the better order would be: "Prohiban fumar en todas partes". The translation of "Smoking is prohibited everywhere" can be: 1. "Fumar está prohibido en todas partes" that seems a comment 2. "Está prohibido fumar en todas partes" that seems more a prohibition

No, it is an exhortation to a group of people, or perhaps to the world at large, asking them to prohibit smoking everywhere: "Prohibit smoking everywhere", cf. https://elpais.com/elpais/2010/11/30/actualidad/1291102569_129110.html

Gracias.

"En todas partes prohibEn fumar" And yes! :)