Since teleport scrolls have been introduced, players have been complaining of other players on top of the NPC they need to get to. A GM is not always available to kick the AFK person, so here is a simple fix to help you out.
To use your settings to bypass this issue, While in game press Z or Alt+Z. Go to Options (see shot below)
In the FIRST tab, look at the bottom and use the SECOND drop down box to choose "Except for characters, elementals and pets". Then Confirm and close the window. (see shot below).
Be sure to change it back to whatever you had it to before if you plan on PKing or PvPing....you will be unable to click any person, pet or elemental until you change it back.