Signage and message are not always the same. Sometimes understanding comes only with context.
For example these two signs were placed two meters apart along a narrow pathway in Singapore. Ignore one and beware of the consequences.
Other signs could mean anything or nothing at all. Like this introduction to the latest in customer service, Japanese style.
Some signs imply more by what is not said. For instance, what does this say about a country’s non-bottled water?
And some signs … perhaps they say too much.