Pedro Martínez: It's happened to numerous people and it's "only their fault". Each time. Time and again.
The point is that it's preventable. Trivially preventable. Good design doesn't encourage people to make mistakes. Good design takes human perception into account. This is generally the case here at BrainKing but here is one instance where it's clearly not the case. You may not have a problem with it but many have and many more will. Ask those who have failed to notice the warning whether they would have made the mistake if the text was in red.