In runescape do you get banned for using auto typers?

Yes, RuneScape auto-typers are illegal in-game. They are a form of Macoing. You can recivie a high/long ban if you are caught using one. They are also really annoying, and Player Moderators can mute you if you are caught using one. Moderators do this to keep them from flooding the Chat window.

You can also report if you have found someone who is using one.

When you click 'Report Abuse', type in the name of the person who is using the Auto-Typer. Then on the next screan, under HONOR, select "Macroing or Use of Bots".