The world is full of signs and messages that are important, informational, and inspirational. We count on the people who design these messages to have a basic understanding of what's readable. Sometimes, that basic understanding goes missing. In those cases, we're left with messages so incomprehensible that it would have been better to say nothing.
The below messages, collected by the fine folks at the Reddit forum r/DontDeadOpenInside, perfectly fit this unfortunate category.