I sort of did that, but not on purpose. I almost always set my game on pause over-night, because I don't want to miss anything.

I'm on level 3 in all tech departments and had everyone doing thier tasks nicely. I thought I had them all nicely trained... you know... no more foraging, keep the field tended and go fishing when food levels go down a bit...

But a few times now, I have left it on fast speed, unattended for long periods. I check in, and they have the berry bush stripped down to one berry, they're all doing laundry (where are they getting all those clothes? lol!).

Another time, they were having trouble keeping up the field and doing rain dances, so I put most of them on farm duty, and all of the scientists (no longer needed for tech points) on fish duty for a while, until the food levels got back up. I got distracted (with real life, lol!) for a while, and when I came back, their food levels were in the thousands because no one wandered off from fishing, like they usually do when I'm watching them! Some disaster wiped out the food though, so there's no chance of too much food.

And absolutely NO ONE is allowed to be on breeding duty unattended, not even for 5 minutes! Even without the Adept or Master breeder status, they seem to do quite well at it.