Could f.lux damage my computer or monitor in some way?
Just a silly question, but I read some comments in other websites that disturbed me a little.
No, it's impossible to damage a monitor by just using it.
This is only changing the color of the screen, it's not changing the backlight, or any major settings.
It's similar to setting your background as a yellowish orange color, but having that tint over everything on the screen. There is no way this can cause harm.