When I was young, the father of one of my best friends had a strap like that, but it even had another piece that clipped over the watch itself to protect the watch from scratches and dings.
He was one of the most "manly" men I've ever known. A qualified electricial and carpenter, he largely built his family's home himself. He was a keen hunter and fisherman and could skin and field-dress a carcass with ease. He had a private pilot's license and used to fly his kids to remote cattle stations in western Queensland during school holidays, where he'd take them hunting for wild pigs and foxes. When I was fourteen, he sent my friend and I off into the wilderness near their place with a sealed envelope, map, compass, water and rations for three days and told us that he'd see us when we got back. When we opened the enveloped, we discovered that we had to hike about 15 miles through rough terrain to the shores of a lake, retrieve something that he'd deliberately left there for us in a cairn of rocks, and then return home again. Of course, this was well before anyone had mobile phones or EPIRB beacons.
So, if you're a hipster-doofus who wants to look like an urban lumberjack with a watch strap like that, then definitely LKP should send the FSB after you. But if you're like my friend's dad, and you lead an active life and actually have a reason to protect your watch, then it's OK - although I personally don't like the way it looks.
