You can get away with saying some outrageous stuff as long as it is viewed as coming from a believer in good standing.
You can display cognitive dissonance like a badge of honour, bringing up whacko doctrines and attitudes while there is Worldly company present. Make sure to say stuff that the Dub already knows, but would never mention in public. If they do have a go at you for it, don't get into an argument, but make them explain their reasons. Try to get them to say things that will give them trouble when they try to get to sleep at night, without you making any statements that are not supported by the WT.