No theory, Pelly. These sick satanists are into "hiding in plain sight" so they flaunt their secret society associations with childish hand signals to each other, and corporate logos, etc.
The McD logo "M" is a 3, and usually underlined so that it is a 13, representing the 13 illuminati families.
Most major corporations now have some kind of satanist symbolism in their logos i.e., eye of horus reference, pyramid, certain numbers. And their advertising has many hidden images, but lots of in your face things now.
Once you crack the code, it's easy to see everywhere. And I mean, everywhere.