I make choice to use/ignore weather based on what I'm feeling. I played at a place that had rainfall every day, and before this, I enjoyed seeing what +weather had, or what it put into the desc of the room for me. Either the person didn't realize how to get the code to work right to represent annual rainfall correctly, or they thought it was a rainforest. Still, I choose to use it or not depending on what may be happening. A planned scene to go to the beach, then hit the grid and its raining - ignored. Random RP to get folks together, I'll set and use whatever weather they have in mind. If a place doesn't have it, I'll google the location to see what the current weather is sometimes.
In fact, I google anyways when using modern real world locations, to see if anything is going on to give flavor to a scene. Septemberfest in September, Nationality Day on the Green, if it has something going on, I'll describe it in a set that we can use or discard as the scene develops.
So, even if I'd choose to ignore it, population code cold be interesting. Depends how much effort one wants to put into it. I wouldn't just want to see its at x percent capacity with a lean towards ignoring fights or calling in fights. If it somehow used some &area coded into the rooms, I would certainly use it as an option. Like one part of town is college district or another is stadium district, and you threw in just a few more words for flavor for area or time of year like 'game day, fans are here' then folks know it could get rowdy and anyone looking for random bar fight could spruce it up with by being an opposing fan or something, or you know , near the college, 'dead week, lots of students, but all are quiet with nose in books' and folks would know starting something during study times would get cell phones calling 911 at any disturbance out of pure annoyance. I think if implemented right, I'd certainly use it to save myself time from looking this up (and yes, even on original theme/not earth game, I'd check their calendar for holidays and events that may overlap into a scene setting).