I have exactly the same issue: the monitor dims even when f.lux is off.

Yeah, the hotkey settings (or lack thereof) is really annoying.

Are there any registry hacks to disable certain f.lux keys?

Can you post which video card & driver you are using?

We do not send commands to the monitor ever, but we suspect some drivers are trying to do this (sometimes badly).

Plus, I'm not a fan of it leaving no option for setting times in general at all. I mean, I get that the team has said that they want to use this to educate people on how light has an effect on us, but I personally have worked night shifts and had to sleep during the day and had family members who did the same (prior careers in nursing homes/hospitals) and it would've been awesome to have something like this that I could optimize for my own schedule.

I'm just replying to add my voice to this request, since the forum has no "me too" option.
Please don't "probably" add this in the future,
please DO add this as soon as possible!
More options are better than fewer options. For some reason, we are in an age of settings minimalism, in which options are removed, rather than simply being placed in an "advanced" section (or simplified in some other way).
Users want customisation, and an option to toggle notifications on or off is, I believe, extremely important.
I concur with @Chucky on being zen.

Thank you for a wonderful product! I post here only because I wish to continue using your software, instead of the other options.