Being an average every day gal we don't want our bra straps to show, it's just tacky; however, there are outfits that are a bit hard to manage. That being said, I was taught to color coordinate the bra with the outfit so it's not so blatant. Of course the optimum solution is to dress appropriately in the first place, but when out and about in the general public you'll see average woman going about their business with the occasional strap peeking over the shoulder as things tend to fall out of place as we scurry about. Not a crime, or an OMG moment, just life.
On the other hand, if it is a new fad I haven't seen yet I doubt many 50 year old woman in my public circles will be following it so I won't be the odd ball trying to coordinate and cover.