Akismet for Multisite

Take your API key and add it to your wp-config.php like this:


This will hide the key from any site on your network that activates Akismet and will use your key automatically!

I discovered this today, so I thought I just had to share.


The plugin still doesn't activate automatically. Does anyone know a quick and simple way to do this?
It won't work in the mu-folder (I tried lol)