> If the venue is not correct, the facts of the case are not evaluated.
More precisely, the facts of the case are not evaluated by that court. Usually the case will be transferred to a different venue (i.e., federal court in a different district) or dismissed and refiled in a different forum (e.g., state court instead of federal court).
In Mr. Auernheimer's case, had he been successful in his improper venue motion, he probably would have faced prosecution in either his home district or the district where the AT&T servers were located. The result of that trial might have been the same, but there wouldn't have been a vacatur.