1. Free Upgrades. You ask a noob for his armor so you can upgrade it. When you get thier armor from them just take it.
2. say you will sell steel armor but instead give em iron(works with all types of steel and iron)
3. say some thing like "runescape won't let you say your password *****"
4. (only for high levels) tell them to follow you to drop party, take a backroad to wild and slay em.
5. say you will smith for free and take bars
6. tell them to drop thier expensive items that you want "duplicated" and then tell them to press Alt+F4. By pressing this, the game window closes and the thief(you) easily takes your items with you out of the way. By the time you load the game and log back in, the thief(you) is long gone.
Fin