How not to design a sign

I came upon this well-meaning sign at a university guest house. Can’t fault its call for responsible behavior, but what were they thinking when they created it?

It never ceases to amaze me how little attention people pay to creating text that is easy to read. You see PowerPoint slides with red text on a blue background, which is an incredibly poor choice for visual contrast. And here they were perhaps thinking that the visually cluttered garden in the background would make the lettering easy on the eyes!

Though,  to be fair, they probably weren’t thinking at all…