if you trade out, tell the ref you shot them first, its surprising how often they will wipe you down
keep shooting them till you know they are out for sure, just ignore them if they complain about overshooting its their own fault for not going out, if they complain on the way to the dead box remind the ref that dead players talking is a 1 for 1 penalty.
If you see your player has a hit on them and they havnt noticed and will therefore probably get a 1 for 1, shoot them yourself to let them know they are out. (i gotta give the credit to tommy webb for that one)