I’m Annoyed With Poor Signage

I’ve recently come to realize that I can get very irritated at poor signage or “notices.” For example the below sign is posted at my workplace:

I cannot understand the purpose of the quotations around the instructions posted on this sign. The purpose of the sign is to instruct you to do something. Taking off your shoe covers is a sanitation issue, so it needs to be done. Quotation marks usually used denote something someone said (quotes), jargon that’ll be explained later in some writing, or to denote cynicism. To use it around the bold text of a sign just weakens the message, I think, and looks ridiculous. This is official signage, by the way, not some 8.5″ by 11″ paper stuck to the wall. There are a couple other signs posted elsewhere around work with quotation marks, but picturing them will only frustrate me more.