Will the Akamai NetSession Interface ever deliver content to my system that I have not asked for?
Absolutely not. Only content or downloads that you have asked for will be downloaded by the Akamai NetSession Interface. In addition, some content providers may allow you to sign-up for background-delivered content channels. For example, a sports site might offer a highlights reel that you can sign up for and have background delivered. If you signed up for that channel, it will be pre-delivered to your system as the highlights are made available.
*Sadly, we had to bring back ads too. Hopefully more targeted.