by Mrs. Luca Black » Monday 15 August 2005 3:09:59pm
The house elves inside Hogwarts would not be used to spy on anyone in the Order or do evil deeds because they are the property of the Headmaster/mistress. Beyond that, they all seem happy with their position and are treated very fairly, so there is no reason for them to disobey (Dobby and Kreacher were miserable).
I agree with Sunset|Girl; they need to apparate in the castle because otherwise their jobs couldn't get done. The system works and there is no reason for it to be changed.
I also agree with whoever said that most wizards are too proud to have house elves do work they should do (spying, killing, etc).