For anyone looking to jump to the part about background programs:

> 9.2. Does Riot run programs on my device while I’m not using the Riot Services?

> (We may, for limited anti-cheat purposes.)

> In order to prevent cheating and hacking, we may require you to install anti-cheat software. This software may run in the background of your device.

The language here implies you will be notified and consent to install the anti-cheat software - it doesn't seem like these programs will install and run without your approval but that's just based on the very brief summary here which might not be accurate.