That's a new one to me.

??? How long have you had the bike and did you ever have the forks out? Can't see any reason not to use locking agent there, maybe someone else may, but I've had the forks out of all my bikes, and one many, many times. Tourqed to the correct amount (50 ft lbs), never has one come loose.
I have owned the bike for just over a year, I replaced the fork seals when I bought the bike and have put 6000 miles on it since then. I know for a fact that I tightened those bolts enough, unless my wrench needs to be recalibrated. I'm really surprised that the forks did not move at all, those bottom bolts must be doing all the holding...