This screenshot is about half a month old. I've just opened two of these at random and they both still post in t_d.

If it were a few idiots, they'd be easy to ban. I've moderated a controversial sub for years and I guarantee you that a few idiots are easy to ban way before they reach the stage in which they're comfortable with posting shit like this. They know that they won't face any consequences.

If you think this kind of thing is hard to find on /r/The_Donald, you've either never visited it or are (possibly willfully) in denial.