Can parents control their teenagers attitudes?!

So I was recently over a relatives house and I was observing how the children there are really out of control. There is hardly any discipline and the kids are out of control. I'm talking about the kids basically talking to their mom like they were trash talking to a rival opponent over a competition. Parents need to step up on their discipline skills big time. I was brought up to respect adults and elders and there are only a handful of kids that were brought up that way. People say "Oh they act like that because they're teenagers and they're just going through puberty." BULLSHIT! All of that crap is all in the head and people just use that as an excuse just to get away with it. The reason why teenagers act like that is because they want to see how much they can get away with it.