Ha, yes! I've been told throughout my life (20 years of age; I turn 21 tomorrow) that I look angry, upset, etc. I'll never forget this one time back in school, I was sitting on a bench during lunch break with my mates and one other classmate must've been walking past, and he said to me, "Dude, you look like you're gonna come to school one day, bring out an AK and shoot everyone." Obviously, that wiped the 'resting b***h face' off my face and we all laughed.
Another time, fairly recently, I was in the food court in our major shopping centre (always loads of people), let me just tell you, I hate going there, I hate being there. Too many people. So, I find myself walking around with that RBF a lot. So, I was in the food court and one of my school mates whom I get along well with was working at one of the shops at the time, but I didn't know, so I had my RBF on and was making my way to the exit doors. As I was walking past his shop he called out, "Ryan!" and I looked up and saw him, and then my RBF was, again, gone, because I had a reason to have a happy face. Anyway, I walked over and started chatting with him and he said to me, "Dude, you look like you're on a rampage or something". HAHAHA! I thought that was funny. I then explained to him about how that's just how I look in those types of places because I don't like them. I must say, though, that having an RBF can be good, because according to what I've been told, I don't look too approachable and friendly, so nobody's gonna wanna talk to me at all. Quite helpful.
Yeah, that's my two cents.