We were parked on a taxiway once and an aircraft was clearly lined up on the taxiway to land. The pilot also told Tower that she sees lights and aircraft on the runway, tower also told her the runway is clear.
For us to have transmitted at that stage ala "where's this guy going? He's on the taxiway" would have risked blocking a vital transmission, either from landing aircraft or from Tower to Go Around, at a critical point. We put all our lights on and waited.. Tower told aircraft to go around, she didn't miss us by far.
It's one of those situations where interference can save you, or it can seal your fate.
"Air Canada go around" from one of the waiting aircraft would have been a far better (and briefer) call than the one made.