And yes, I am brainwashing him against all the corpo crowd.

Sounds more like you're deprogramming them.

The brainwashing is the Marketing and PR from the big corps that turns people into mindless consumers and even fans.

The overwhelming amounts of Advertising everywhere every day aren't there because people are naturaly prone to love brands, they're there to (mainly using techniques from Psychology) shift people's perception feelings about a brand to make them love the brand, and if you pay attention most of it is designed to influence people via their subconscious pathways (such as familiarization and associating the brand with other things they feel as positive) rather than to convince people with rational arguments via their conscious mind. So it's the Advertising that's using the same kind of technique as brainwashing.

If you're trying to change your kid's mind via convincing them of something (i.e. rationalizing with them) rather that through psychological trickery (for example, relentless pressure until they comply), then what you're doing is the very opposite of brainwashing.