Yeah, I have to admit that Patripassionism has been declared heretical. On the other hand, given the number of things which are major formal heresies and are taught as if they were Christian doctrine, I figure God'll give me a pass on the old Patripassionism. (My Christian ed group had a little debate as to whether that or Pelagianism was the favoured heresy, but I've always fallen back on the out that Semi-Pelagianism is okay …)