There are a few people like that at my place. Has zero impact on my life or work. None of my business who/what they are, as long as they do their job. It's really simple. Each to their own innit?
The irony seems to be missed by people who declare "It's just not natural" while they're using a mobile phone, and a computer, and driving a car, and owning a dog, and living in a house that has a constant supply of hot water, etc. etc.