Same here..but in that case of XP..one could not even access that panel GUI for Java..I also have them go into the advanced tab and change a few things in there iif they really need java installed. Screenshot above is default settings in the advanced before changes made there.
I usually run javacpl.exe manually, and as an Administrator, since some time ago Sun/Oracle decided to make many settings only available to Administrators and I'm usually logged into a non-Admin account.
FYI if you have the 64-bit version of Java installed along with the 32-bit they share the same settings. I use the 32-bit javacpl.exe. -- Don't feed trolls--it only makes them grow!