Any way to lock the dock?

Question

Is there any way to lock the dock so it can't be changed? Every so often one of my kids drags an icon from the dock and I have to add it again.

Answer 1

and here is an apple script to toggle the lock on Dock on/off. Paste it into Script Editor and save it as an application.
<pre style="
font-family: Monaco, 'Courier New', Courier, monospace;
font-size: 10px;
margin: 0px;
padding: 5px;
border: 1px solid #000000;
width: 720px;
color: #000000;
background-color: #ADD8E6;
overflow: auto;"
title="this text can be pasted into the Script Editor">
try
set x to do shell script "defaults read com.apple.dock contents-immutable"
if (x is equal to "0") then
do shell script "defaults write com.apple.dock contents-immutable -bool true; sleep 1; killall Dock"
else
do shell script "defaults write com.apple.dock contents-immutable -bool false; sleep 1; killall Dock"
end if
on error
do shell script "defaults write com.apple.dock contents-immutable -bool true; sleep 1; killall Dock"
end try
</pre>