If someone, outsider or otherwise, just randomly starts spamming for no reason don't scream "spam! ban him!" YOU are causing spam too and making it hard for the moderator or admin to see who the main spammer is. When you asked to join, you signed up saying you would abide by the policies in place yet, as soon as someone breaks one you join in, even if it is to tell them to stop. Don't be an idiot. Or an asshole. (You know who you are. You have been ignored in game.)
A real life version of this is in a cinema or library, when someone starts talking and everyone 'sshhh's' them it causes equal noise and is just as annoying.
