Paranoia aside, putting that many cell basestations seems like a ridiculous thing on many levels. From the telco stand point it means WAY more cell sites to manage, they may be tiny, but it's still a site that needs to be managed. It needs rectifiers, batteries, cooling, portable generator hookup, fibre feed/transport equipment, etc. That seems like a super inefficient way of doing it when you can put up a couple towers at the city outskirts in the bush with 3-4 sectors each to feed the whole city like a normal setup. These small base stations will probably have small gel cells and not larger ones you'd see in a bigger cell site with a hut, so that means they will run flat faster and will lose lot of capacity each time. There are only so many techs and so many portable generators to go around, you end up having to prioritize and drop stuff. It's going to be a shit show when the power goes out, glad I don't work for that telco.
I'd also be a little worried about that much RF, cell antennas are really meant to be up in a tower and "beam" to a larger area. Those levels of RF is not super dangerous but still something that can be problematic at high levels. RF burn is a thing. At super close proximity (like touching an antenna) 5w is enough to be an issue. As for the smart meters those operate at under 5w I believe, nothing to worry about unless you're sticking your tongue in it.

I'd have to check mine to see if it says on it, it might have details such as frequency.
Suppose there is a privacy issue as they can figure out your usage patterns and that data could be used against you to determine if you were home or not at a specific time but I have not heard of this ever happening.
Overall it seems to be blown out of proportion, I'm more surprised at the hilariously inefficient plan they have with how they want to distribute cellular service.