These are players that do nothing useful for RuneScape and make the game annoying to play, but are not necessarily on the same level as griefers.
“An Abyssal player killer is someone who disrupts players RuneCrafting in the Abyss. Sometimes...Abyssal Pker
“Spamming (or flooding) is when a player repeatedly says random gibberish for no apparent...Spamming
“A Flag Hog is a (typically high level) player in Castle Wars, who takes the enemy team standard...Flag hog
“Some of the most annoying things in Runescape are players you don't understand the game, but act...F2P "Houses"
“A scammer is a person who scams other players out of their posessions and are more common in...Scammer
“A Beggar is a player usually a lower level that begs for free items. Beggars usually never...Beggar
“A Scavenger (also known as a looter) is someone who collects drops from other people's kills in...Scavenger