Google have finally made it possible to get the "What's Hot" rubbish out of your main Google+ stream. Here's how:
- Go to Google+.
- Click "What's Hot" on the left-hand side.
- At the top of the page, there's a subtle little slider (basically an O on a line). Move it all the way to the left.
(If you don't see a slider at the top of your What's Hot page, just wait a day or two for the rollout to come to a server near you.)
That's it, you're done. Yay!