Just interviewed someone from a hotel room. They had the curtains open and I could see beach and ocean in the background.
I guess I wouldn't recommend that totally. However, I don't get bothered by those types of things. I enjoyed the view from afar and it gave us something to talk about for a bit.
I guess everyone has their line. For me personally, if I see someone interviewing in a bright orange and purple suit I check it off as a failed attempt to be memorable (your accomplishments and personality should do that). Interesting socks with an otherwise appropriate suit? That's ok. Open curtains while interviewing at a vacation spot? Bah, no biggie imo. I didn't even think twice about it until I read this thread.