First, the macho crowd that has always gotten tattoos, soldiers, sailors, merchant marine, prisoners and circus types, are feeling squeamish when they are surrounded by the modern day cowards who are wearing tattoos. These traditionally macho people are writing to get reassurance that they are still macho.
Yes you are. Especially our soldiers in the Middle East who get “Infidel“ tattooed on their chest.
Second, I'm not sure we know what macho is in our modern urban society. I see it on occasion.
The situation is a belligerent out-of-control individual in a public place who is scaring or threatening innocent bystanders, often women and old folk.
I personally intervene, because I am macho and proud of it (I have no tattoos). I'm also careful about how I handle the situation. I am always aware of who else joins me in protecting or trying to protect the innocent and vulnerable. These are other macho people. Usually they are men, and usually they look like responsible members of our society, based on clothing.
It is often, the people who don't step forward to help, who have tattoos these days.