I have seen people post on their door in a big sign how they lived in a “Cell Phone and Sushi Free House”
If that is not trying to prove how Helig you are to the rest of the world, I dont know what is, If you dont want a cell phone and Sushi in your house, that is perfectly OK, but once you broadcast it to the whole world in big letters you changed the whole reason
And I unfortunatly I see this kind of activity all the time, People only buying from THAT hashghca or only davening at THAT shul etc