Everyone makes mistakes; I tend to be forgiving.
For example "eating in the street is rude" is one of those things that's just a foreign concept to many people outside Japan. I just so happen to know about this from a YouTube video I once watched, but if it wasn't for that I could see myself doing it. Hell, even with that I could see myself just forgetting because it's such an alien concept to me that this is considered rude.
I was more saying when a tourist considers their actions. Not if. Of course not everyone knows every social idiosyncratic curiosity of countries they visit.
But "I'm only a tourist, it's ok" leads to the egregious "tourists are bad" concept.
Because you included the word "egregiously" I suppose technically you are right, but only on a technicality. A small "wrong" at the individual level becomes "egregiously" wrong at the population level.
- one person eating food in the streets in Japan isn't egregious, every tourist doing it is.
- one person being loud in a church in Italy isn't egregious, all of them is.
- one person touching some old Australian rock art isn't, every tourist doing it is.
When you consider your actions as a tourist, you have to consider a million people doing the same. Anything else is being a bad tourist.