I think I've soiled myself

Psst

photo of quiet zone sign on the outside of train
Mysterious: what could this sign, on the outside of a Deutsche Bahn carriage, possibly mean?
photo of quiet zone sign in train
A similarly cryptic symbol appears above the windows, inside the carriage.

Rant-mode: ON

Quiet zones in public places or public transport: there's a clue in the name. And they're clearly signed, it's not kept secret.

So why do people set themselves down in the quiet zone on the train, and then proceed to do anything but that? Worse, why do they give their disrespectful, snot-nosed brats crunchy crisps as a snack? They are clearly selfish and fucking RETARDED! (mad)

Hrmph!

Rant-mode: OFF