Comment by SnuffBox

This is something I've always felt about design in general. You should never make it so that a symbol for an inconvenience appears happy or smug, it's a great way to turn people off your product or webpage.

Reddit implemented something a while back that says "You've been blocked by network security!" with a big smiling Reddit snoo front and centre on the page and every time I bump into it I can't help but think this.