It's one this to see a meme or other bit of mayhem take over your regular reading material, and say "Not into it today, sorry, have fun."
It is another entirely to lash out at people for participating, and act like they should have *known* you were in a bad mood, and every bit of the mayhem is a personal affront to you.
The former makes me sympathetic, want to find out about the bad day.
The latter tends to make me pissy right back. I have the same reaction to people who whine about happiness on Valentine's day, or bitch about Christmas cheer.