Everypony think Shining Armor is useless, that he's lazy, or even that he flat out doesn't do anything. Shining could prove them wrong, if he had the time. He does more than they think.
Spike and Donut Joe have always had a close relationship. Friends from the first day they met, and friends to this day...this day usually being one where they both need a break from everything...and everypony.