Liliha & Vineyard 4-way Intersection

We all cite self interest as a motivator in everyday activity. That goes without saying, especially in America, land of the immigrant dream and first generational success stories.
Pursue your proclivities, persuade people of your penchant and get paid. Holla, it’s 2012.
And as a mark of civilized, 21^st century society, we should proceed with maturity and consideration for everyone else. Even while at work, things like offering your seat to the elderly, not broadcasting you cell phone calls, stepping out of a crowded restaurant with your screaming baby, etc, should be second nature.
They are, for my friends and I. My inner circle of trust and proper etiquette. In fact I am often nicer to strangers than I am to family.
Therefore in a way I feel society owes me. No — that is badly phrased. Society owes everyone. For being on such good behavior.
But sometimes society misbehaves. So why is it considered in bad taste to proclaim, with a certain urban vigor, in front of everyone, windows down, «YOU MOTHERFUCKERS!» at this intersection?
Let me elaborate. Approaching this cross of two fairly substantial almost-​always-​badly-​congested streets, your left turn light onto Vineyard from Liliha is yellow so you try to make it. You get shut down like government employee computer systems at 5:00PM. You just missed the end of your cycle. So you wait. And wait. And wait. the light cycle rotates four times. The light going straight up Liliha is soon to be glorious green; it will then be joined by your green left arrow and angels will sing.
As you daydream about your impending freedom to left turn, you actually hear the siren song. It goes: WHEEEEEEEEEEERRRRWWWWWW.
It gets louder, here it comes again. WHEEEEEERRRRRWWWWWWW.
The sound actually seems to be getting closer. Oh God.
It’s a siren. From an ambulance. Coming down Liliha. In a second, it flies through the intersection, turning the lights green. The cycle restarts. With it, goes your aspirations.
You wait again, for another 3.75 cycles, when the siren comes again. This time, from a fire truck. You lose it. You, and your car mates, have been stuck at this light for total of 8 rotations. In this situation (which is more common than one can imagine, with this being the first MAJOR intersection closest to the medical hub of Liliha and Alewa), I think a «YOU MOTHERFUCKERS» is required.
It is, after all, what everyone is thinking.