Except it's only in certain places, and only where the group spending identify themselves as being political. (AFAIK anyhow).
In some ways I find the voter suppression adverts more disturbing. everyone should be driving for higher turnout at elections. I'd rather people went and spoilt their ballots deliberately than didn't vote. Those spoilt ballots are noted, not voting isn't.
I'd love to do something like the Tactical 2017 combined with the Democracy Club stuff that also allows you to easily produce flyers with a map for where the polling station for the area is, and a list of the addresses covered by it, that you could take to a printers to get printed up for you. But I'm not sure that I can code it.
I think I'd also need to look at what you need to do legally around that too, ensuring that spending reporting etc. gets done, but I think that should be codeable too.
I'd love for a central site that pulled all advertising for elections into once place, so that you could drill down to an area and see what has been sent to where, or what has been put up on what bill boards etc, but that seems rather unrealistic somehow, maybe you could pull an amount of it together with crowdsourcing now?