Being able to open them as well would be nice, but allowing users (of at least TL2, if not lower) to close their own topics would help in a lot of cases and prevent what is described in the thread below from being an issue.
https://meta.discourse.org/t/adding-additional-flag-options/108057?u=orangeandblack5
I also know that other forum platforms do allow this, so it would be nice to be able to open and close our own topics if we need to.
Flagging is the correct course of action here. I suggest if you need users to close their own topics you should promote them to TL4.
Pero esto podría dañar el Nivel de Confianza del creador del tema, ¿verdad? Esto parece un efecto secundario negativo…
Para estos necesitarías usar una marca de ‘algo más’ para hacer la pregunta, y esas no afectan los niveles de confianza. 
(solo las marcas acordadas de ‘spam’ o ‘inapropiado’ cuentan, y eso es solo hacia los requisitos de TL3 en lugar de ser parte de todos los niveles de confianza)