Well, yes, to a certain extent. But once you've been trained to project your voice it's going to be audible even when you're imitating softspoken mumblers and not being especially loud. But people will still complain as if you were running around shouting.
Usually we bite, scratch, and get rather unpleasant when people try to do that. Took a good chunk out of my brother the last time he tried to do that. Didn't try it again. Granted, we were like, between 5 and 9 at the time.
I gathered that much, yes. I wouldn't have any compunctions about harming my brother if he had me in a stranglehold. Or was strangling me for that matter.
Look at what you said there. Just... Look at it. He's 21 and you and your parents all fear the lout and can't discuss things like reasonable facsimiles of adults? ಠ__ಠ