Whenever I see somebody incorrectly using the possessive "s" as a plural "s" my brain goes into uncontrollable OCD state of "Their what?! I need to know!".
What's the issue? 11/9/2001 is the only 11/9 that matters? Is that your argument? That people shouldn't be born on days that bad things happened? Spoiler: that's all dates
What's the issue? Is assuming that op meant that all 9/11's are referencing the twin towers your argument? That people aren't allowed to be surprised that an event which changed thousands of lives is being brought up by children? Spoilers: you sound like a jerk
I agree. It's been 23 years... We can't expect everyone to have the world trade center association forever. There are college graduates born after September 11, 2001.