You're the one speaking nonsense and you're exposing yourself to sound like an uncivilized barbarian. There's no good reason for anyone to touch or tap somebody on the shoulder to get their attention. Coming up to someone and tapping them is a physical assault. If somebody taps me on the shoulder or any other part of my body they are attacking me. I'll knock their hand away hard enough to seriously hurt them. Maybe I'll do worse depending on how hard they tap me. If somebody knocks my boobs together then they'll be doing me a serious injury. Then I'll break both of their knee caps and their balls to boot when they're down on the ground, I'll make sure I permanently incapacitate them. Then I'll call the cops to come take my report of self defense against assault and take the assailant away.
If that works for you, that's great. I'm no where near that aggressive and never have been. Perhaps we work in different enviroments but I'm outside and the guys have equipment running, I have absolutely no problem making sure I get their attention and quite often that does mean a hand on someone's shoulder. It's literally safety protocol Plan B to ensure that the individual who didn't hear my voice, does know how many people are on site so nobody gets injured. I expect the same from the guys and it has happened more times than I could possibly count but at no time has any one of us felt compelled to harm another.
I'm also unsure about the belief that all Canadians are the same and while I have never felt the need to paw or maul a stranger, I'm pretty touchy and it's not uncommon for my people to greet each other with a hug or place a hand on their arm to catch their attention.