That may well be good for you Groucho, but that isn't sound advice for the other 99% of the population who are not Adventists. You should watch the movie and then encourage your friends, workmates and neighbours to do the same. It may be the only singular opportunity that they will get to being exposed to Adventist ideas on such a world stage. 

Best leave our theological purity at the door and be a Jew to the Jews and a Gentile to the Gentiles. For all your legitimate concerns of "Hollywood" (not sure if Mel Gibson could be seen as part of that set given his pariah status) best learn to get in the mud as Doss did in the imitation of Christ. 

I've seen the movie and it presents Adventists in a very good light. It is so refreshing not to be portrayed as crazy religious fanatics ala David Koresh and Wayne Bent style!