Surely you should be able to remove your own mock. (Not anyone else's though.) I think it would mean the removal of a lot of crappy mocks like
Andrew Marr Show mock! Surely it would filter out the 3-5 star ones.
EDIT: currently there are 7 faded out mocks (that does include my Marr mock
)on the first page of the Gallery. Some are beyond help. Theoretically, their owners would remove them, but the owners of outstanding mocks would not.