Different person here, but: literally anything. I don't have "anything to hide," but I don't trust the company's judgment (or, more specifically, that of every possible "company representative." It only takes one to make something a federal fucking issue.)

If I do a google search for "cake toppers for lesbian wedding" while my code's compiling, that's morally fine. But if a bored "company representative" decides to take offense to that, now it's a whole goddamn situation that I have to deal with.

Or if I'm on Stack Overflow to copy&paste, and one of the "Hot Network Questions" in the sidebar has an "offensive" phrase in it, is it going to trip their automated flagging criteria?

My concern is that workers who produce the desired output for their company, ie perform the labor they are paid to perform, will not be able to use excess time to be with their family, take care of chores, rest, or otherwise live life, and will instead need to pretend to be busy as though they’re still in an office under the watchful eye of an overpaid manager. Monitoring should be reserved exclusively for cases where an employee’s output is not measurable in any other way, and should then be kept to a minimum. If we exclude the possibility of webcam or audio monitoring, then my primary concern is that a worker will be made to waste their time satisfying the arbitrary metric by which present-ness on their company computer is measured, and so the thing I am worried about being seen is the absence of activity.

Yesterday I was working and my three year old came running -- directly out of the shower -- into the room to show me her doll's "new hairstyle".

Can you answer this directly: How many people's computers, servers, and backups should video of my child be on?

How would you feel about audio recording in break rooms and hallways? How about fart-detectors in the chairs, recording all that to some database?

Same idea, and maybe you wouldn’t mind but surely you can see why many people would.

FWIW enough people do mind that this kind of thing is illegal in some countries.

How can this be a serious question? Much of my company is in an earlier time zone and I frequently log into meetings and start work while my wife is still ambling about, showering and walking around naked. My naked wife is something I don't want my employer seeing. A house is a shared space. No one in it except me accepted any sort of consent to monitor agreement.

Anything in my home, any traffic on my home network, and any sounds in my home that aren’t me directly talking to a coworker about work matters.

I would not accept employment under any terms that allowed my employer to look at me without my knowledge, or snoop around on my computer without my acquiescence.

Anything, I'm paid as a developer I'm not paid as an actor.

I don't really need my company's IT team looking at the meetings I'm booking with the therapist on my employer-sponsored healthcare plan, for example

The short prayer I say & religious gesture I make before beginning each new task.