Oh, sorry yes they did, here what he said:

"Dear Mr. Smith,

In reply to your email, if the player's intent for filling the grooves
with dirt and grass with a practice swing is to influence the movement
of the ball, the player would be in breach of Rule 4-2b. Please note
that the penalty for a breach of Rule 4-2b is disqualification.

Thank you for your interest in the Rules of Golf. The Rule mentioned
above along with Frequently Asked Questions on the Rules of Golf can be
found on the USGA's website at http://www.usga.org/rules.

This response is for your personal information and may not be posted or
disclosed by email or internet posting.

Sincerely,

Bernie Loehr
Rules of Golf Associate
USGA"

LOL..hope they don't come after me for posting this, guess I'am just a rule breaker.