Yep. Everyone is allowed to give ratings, whether they are credible or not.

If you think Vod is hereby abusing his DT powers, (default trust), you can open up a thread in Reputation, https://bitcointalk.org/index.php?board=129.0

Which if considered valid by the "community/admins" (not entirely sure how it works), could remove him from DT1(?) and thus essentially voiding the effect of his rating.

(Although i doubt this is going to happen, looking at Vod's vast track record.)

EDIT: not sure what shitstorm this is going to create.