When a fad or affectation has outlived its coolness, one can declare a moratorium on it. It's a polite way to express one's rage at seeing something silly continue in perpetuity.
1. White chicks with dreadlocks; I'm declaring a moratorium on that.
2. I'm declaring a moratorium on the faux-hawk. It's been co-opted by too many frat boys.
3. I believe it's time to declare a moratorium on the fart app for iPhone.