Copypasta ha ha.
"...Some times, especially at higher level dungeons, etc., there is so much stuff going on you dont have time to look at the chat box all the time, so this can be used to get the attention of party members. This can be used to tell people to move from a boss aoe that may wipe the party, or to attack adds if people did not see them spawn, or even wake up someone who fell asleep at the keyboard! An example of this:
/p Destroy the Infernal Fetters or we will wipe to Hellfire again! <se.12> !!!!"