I think one of the whole point of using a rangefinder is they can be a lot more discreet than SLRs, and it is one of the reason why many photographers choose to work with rangefinders. So it is normal that you want to draw as little attentions as possible. Even for my chrome Leica, I painted a tape with model paint into a color that matches the Leica's chrome and then use it to tape up every inscription and the logo on the camera.
Also if you really want to show the red dot, you may also be drawing attention on certain individuals who are getting ready to snatch the camera from you any moment you let your guard down... I don't even use the Leica straps that comes with the camera; I found it to be a horrible strap anyways.