This thread has me shaking my head. Who really cares if folks sit in the car with their kids at the bus stop? I don't personally do that, but I don't think of people who do in such an annoyed manner. The trend in this discussion seems to be - those who are most bothered by 'snowflake' and 'helicopter' behaviors are the ones personally put out by it - waiting behind the bus that stops at every house, too much traffic thru town, etc. And if it doesn't affect folks directly - they imagine the future impact on their lives - 'my daughter will end up with your snowflake son who can't go to the men's room alone when he's 7!'. Live and let live, folks!
Yes, you have a point there. When it happens to me, I do tend to get rather irked after sitting through three separate "long kiss goodbye" partings on a weekday morning, patiently trying not to think about how high gas prices are while my car, and the 13 behind me, are idling, waiting for the world to start up again after yet another warm, precious child finally scampers out of the SUV and onto the bus.
I also consider those Halmark moments to be teachable. I now know which roads to avoid when driving to work.

Unlike the teacup or snowflake, I don't try to change the world to fit my schedule; I change
myself to fit my schedule. Something I learned how to do when I was...oh...maybe five?
But the effect of the 'teacup' or 'snowflake' children comes to us from other avenues, too. And that could be where some of the bitterness you may be sensing from these posts is coming from. It's the interns we have to deal with who don't know how to research what we need them to research so we wind up having to do that job anyway. It's the fresh college graduate who has to stop whatever she's doing every 10 minutes to IM or text her friend, mother or boyfriend.
God forbid an unexpected meeting happens! Afterwards it's at least 20 minutes of chatting texting and/or frantic phone calls wondering where she was.
And I know I'll be forgiven for moving an office mate's cell phone to a closet or distant drawer when it was left at the office for several hours but the damn thing wouldn't stop ringing or beeping every 5 minutes. "Faithfully" is a cute ringtone once. Maybe twice. 15 times in 40 minutes? He's lucky I didn't take it to the ladies bathroom and flush it.
So yes, there is a sense of angst or disgust when bringing up the term "snowflake" on many people's parts. Some because they don't like what they consider to be a derogatory term. Others because they don't like what they consider to be derogatory behavior that's inflicted upon them from snowflakes.