Strangely enough I have managed to go off down route with a mixed rank crew for years now with hardly any occurances of the problems you suggest.
Never had a problem. I recall an incident where our Gp Capt escort officer had a injured foot and was hobbling around with a walking stick. He was conversing with a rather attractive lady at the bar and invited her to dance. He was whistling her around the dance floor sans stick completely oblivious of his injury. One of our stewards picked up the stick from by the bar, shouted, 'It's a miracle, it's and miracle' and promptly threw said stick into the swimming pool. I suggested the following morning that he should apologise to said gentleman. No repercussions, and indeed years later I reminded the Gp Capt of this incident and he said that he did in fact find it mildly amusing.
As has been mentioned in this thread; a crew down the route is a completely different matter to back at base.