Oh, there are lots of worse ambassadors for the brand - the stuck up hoi polloi being among the very worst, as they chase away the new recruits that B&O depends upon.
Modern brands need to be dynamic and agnostic when it comes to the reasons why people purchase them.
Today's Kanye West is yesteryear's Michael Caine. Same story - Caine had just gotten paid for his first movie success, and wanted to buy a Rolls Royce. He was chased out of the showroom - they didn't sell to cockney's and didn't think he had the money. So he went to another dealer, who has been supplying him with a steady stream of high-end cars ever since.
Just for the record - I think you're very wrong when it comes to Kanye West and B&O. He's recruited a lot of new customers for the brand.
Here's how Michael Caine bought his first of many Rolls Royces:
One of my favorite stories in your autobiography about the class system in England is what happened when you went to buy your first Rolls-Royce.
It was a bit naughty on my part, actually, because I went very scruffy on a Saturday morning. I had a piece of paper, like a shopping list, and I brought the paper out in front of the guy (at the Rolls dealership) and it said “Razor blades, toothpaste, Rolls-Royce, eggs…” (laughs) And I said ‘Oh yeah, Rolls-Royce. How much is that one?” He said “How many do you want?” (laughs) I said ‘I only want one. Are you usually this rude to people who come to buy Rolls-Royces?’ He said “Get out!” So I said ‘I’ll tell you what, I’m going to call you next week, and I’m going to drive by here in a Rolls-Royce I’ve bought somewhere else and I’m going to give you a wave, okay?’ He said “Get out!” (laughs) And that’s what I did. I drove by and I gave him a very particular wave. When Americans do it, they only raise one finger, the middle one. When the English do it, they use two fingers, with the top of the hand facing out. It’s not a victory sign or a peace sign, which is the opposite way. What that is, is the two fingers go back to the battle of Agincourt when the British secret weapon, the atomic weapon which won that war, was the British archers. And when the French used to take them prisoner, they would cut off the first two fingers, so they couldn’t use their bows any longer. So before the battle of Agincourt started, all the archers held up their two fingers, to show they were ready. That’s where that came from, and that’s what I used on the guy with the Rolls-Royce, although I didn’t fire an arrow at him! (laughs)
A modern brand that is uncomfortable with attitude has nowhere to go.