Revert "Fixed User.blocked expression"

This reverts commit d522216e.

roac/models.py

@@ -16,7 +16,7 @@ class User(db.Model):
 	def blocked(self):
 		return db.or_(
 			self.time_unblocked == None,
-		  self.time_unblocked > datetime.datetime.utcnow() - datetime.timedelta(minutes=5)
+		  self.time_unblocked < datetime.datetime.utcnow() - datetime.timedelta(minutes=5)
 		)
 
 	def block(self):