Corporations can vote now. If they own land. In some states.

Which is fine, they only get one vote.

But they can also divide a piece of land into small plots, make a bunch of shell companies, each one owning a small piece of land, and vote using that.

This was discussed previously on Hackernews: https://news.ycombinator.com/item?id=48295460

Isn't this just on Fenwick Island? And the state would have to approve the (possibly suspicious) creation of numerous shell companies for this purpose.