I tape my cameras. I have an MP now, so nothing to tape on the front, but I did tape my M6 when I had one. I started doing that to all my cameras back in about 1979, when my Jr. High School Photography teacher suggested we all do it. I grew up in NYC.
Mugged? Yep. Personally probably about 5 or 6 times up until my mid teens. Then again once when I was about 26. That's not counting having buss passes stolen countless times as a kid. That was NYC back then.
About 6 years ago, in the Spanish Quarter in Napoli, some punk on a Vespa rode up and tried to steal my watch. He didn't get it, but he did get knocked around pretty well for his effort. It would have gone worse for him if I hadn't been holding a 16mm Bolex camera in one hand.
I tape logos on camera gear now mainly for esthetic reasons, and also because we tend to "Greek" out all logos in the film business for props that appear in frame. It's just become habit by now. Also, an all black camera reflects less well in windows or glass like surfaces.
Insurance is a must IMO. I can let a camera go if I feel any real danger. If it's just a young inexperienced punk trying to learn the ropes, then I'm less apt to comply. You have to trust your instincts on that though, and the safer and smarter solution is to simply hand anything they want over to them. Sometimes that's hard though. I get pissed off.