no. an ace requires witnesses. unless you could get a tree to talk. If you could get a tree to talk you think it would be more along the lines of "OWCH them damn discs hurt!!".
... that's nonsense... if you ace it you ace it regardless of witnesses (i however, also think this disc signing business is a little bit silly)... and shame upon the people who so lack integrity that they would cause a person to feel that way... oh, right... nevermind me... my only aces have been on tone poles and all y'all basket snobs don't count those either... ... seems to me as some folk be forgetting their roots and where this game came from... okay, sorry 'bout that, rant over...
peace threw disc golf,
"'There are two mantras.,' Bernard said, 'Yum and yuk. Mine is yum.'"
Tom Robbins, Still Life With Woodpecker