As soon as you stop being a pest to other players you may leave "noob-dom". Asking dumb, easy, unrelated and such questions, even worse if frequently for no other reasons than too lazy to open up KBase/Fansite can be a factor. Being very annoying through many means, such as, killstealing, stealing training/slayer and such spots, crashing monster hunts, crashing events in general for no other reason than to be an annoyance/laziness can be a factor. Being very unsuccessful in a game for no other reason than your own dumbness/laziness can be a factor. Generally, no one would go about calling other people noobs, save for noobs themselves. Personally, I don't mind a level 50 player walking around, minding their own business. As soon as they start pestering me about whatever comes in their minds, first thing that shoots in mine is the word "noob". Some questions to help them out don't trigger that, for example, best training spots and such, but things like "wear can i buy ur cape", "wow u r rally good (Yeah, oh, you've got something on your nose, it's brown.)" do. And then there are playful noob-callings which I don't mind. :P