Yes, I would suggest that you worry about them too.
in general, I'm not worried about anyone of any age being about to take me down and ground and pound me. If i get jumped and knocked out with one punch, I wouldn't have needed a gun anyways. If someone unarmed wants to fight, or kill me, I won't say that I'm going to win decisively, just that they're not going to do to me what Trayvonn did to Zimmerman. I won't need a gun to walk away with my life.
ETA - I'm not saying all of this to brag. I never talk about my wrestling career. But you said lots of 17 year olds would beat my ass. I happen to have some evidence that isn't true.
I do not carry my gun to protect myself against unarmed people. Zimmerman would be fucked if he was an outstanding wrestler, because the jury would never believe that Trayvonn took him down and was beating him in a way that he was scared for his life. You don't think that would come up as evidence? I wouldn't believe Zimmerman. The only reason his story makes sense is because its easy to believe that a 17 year old whomped his fat ass.