It's worth noting that at a certain point things achieve such cultural penetration that very few teens rebel against them in that way. [1]

At some point they're simply treated as ubiquitous human endeavors.

[1] 7-11, Coke, iPods, Nike, McDonalds, Levis

When teens resist adults on these points, it usually manifests in minor styling differences or personalization. (cross brand promotion, garish colors, etc)