I'd agree, they can do it and mine do / did (12 & 15). That said, as time has progressed peer pressure and perceived maturity has made this less of an occurrence.
I disagree, yes it was more aggressive all round but you had a childhood and you could make mistakes, have laugh and get on with life. I feel for kids today, social media means they have to be in the spotlight 24/7, they have reputations, standards and brands to stand up to and everyone's life...
I remember a teacher at a Horsham School who would arrange a punishment to be dealt out at break times in the changing rooms. He'd smack you on the backside after you'd changed into some rather fetching silky 70s football shorts!! I legged it out of school when faced with the "punishment"...