Percy looked at the questionnaire and went from annoyed to infuriated in less than a second. Who knew that he could be a Weasley when the need arose. He didn't waste time penning two owls. The first sent to all Aurors, and the second a reply to Umbridge.
Madam Acting Minister,
While I understand the spirit of your request, the Auror Department is and must remain an independent office. Any and all actions taken by present and past Aurors are by nature protected by said separation of power.
Considering all of the above, I have taken the liberty to inform all my present and past staff of said matter, and you shall not receive any replies from them.