Hand ball...by the referee!

[BillyMac]

c) Throw-in violation on A for throwing it OOB untouched by any player?

I was taught to almost always treat the official like he, or she, was part of the court, be it inbounds, or out of bounds. The only exception that I'm aware of, is when a player with the ball who is inbounds touches an official who is out of bounds, there is no violation here, because in this case the official is a person out of bounds, not a thing out of bounds.