Is Blizzard scanning RAM of my computer?

Ok so i did some test i started cheat engine and DID NOT attach it to wow it just ran doing nothing, wow was in non elevated account and cheat engine ran in elevated account with UAC on. Yet world of warcraft refused to start because i had it in ram somewhere.

This is unacceptable! Is Blizzard spying my computer? It's not safe to do internet banking with this kind of approach! What else are they spying in my computer?

I do have stuff to hide! My paypal/ internet banking/ NDA work stuff!

I'm pretty sure this is against the law in EU! It clearly scans ram outside of it's allocated memory occupied by Blizzard games/programs.