By defining the $thing, banning the $thing per definition by law, and then tasking FBI-like organization enforce the law? It won't completely go away but it will subside, like how gambling on Internet is divided binary and confined into lootbox games without cashing features and straight up scam underground casinos.

Personally I think we should start from separating good old ads(that existed before I was 15) and Internet "ads". The old ads were still somewhat heavily targeted, but less than it is now. There probably would be an agreeable line up to which level advertisement efforts can be perverted.

I think the main problem is lots of money are made from it, and money influences politics hugely. The technical difficulties are low on the list of reasons this is not happening.

https://news.ycombinator.com/item?id=43595269

I know. It's wishful thinking that will never become a reality. I pray for a solarpunk future in the same way