I've got so many stories I could tell about the stuff I've seen or owned myself, but I don't want to overload a first post with all of them. So here's one to start:
The last, say, ten years, I think every single visit I made to a shopping mall has involved me seeing some piece of Dragon Ball merch, at the very least a T-Shirt. Earlier on, Hot Topic and Spencer's were the places to go if you needed a Goku shirt, but now its seems like half of any mall I go to stocks Dragon Ball stuff. There's the fast-fashion places like the aforementioned Forever 21, the skater shops like Zumiez, and the traditional department stores like JCPenney, all with something Dragon Ball to find within. Not to mention those t-shirt screen printing stands, one of which is where I found this gem:
My favorite instance of "peak Dragon Ball" at the shopping mall I've witnessed was when I visiting my hometown's mall over these last winter holidays. I step in to a sneakerhead shop, where they sell shrink-wrapped Nikes and the like, and in the back they have a muted TV playing the Ninja Murasaki fight with subtitles. Wasn't expecting some pre-Z love in a place like that, but I was all for it.