Perhaps we could have a debate on what CRM is and is not.
Seems to me everyone wants to use it to prove their own point. If a cabin crew member feels that a pilot has been rude to her, she'll say "What sort of CRM is that ?" and the pilots will pretty much say the same thing in the reverse case.
Wasn't CRM introduced so that when there are problems tasks get delegated effectively and people are able to contribute any relevant information. This is supposed to mean that we don't end up with people doing stupid things that everbody else is aware of but is too scared to point out. Whether it's landing at the wrong airfield, or equally, the cabin crew doing something inappropriate with a passenger. Ideally two-way communication should be possible.
The way I see it the best way to try to get this communication going again is to talk about stuff. If you shout at someone for messing with your temperature controls they'll just get the hump. If you explain to them that any adjustment of the engine controls affects the engine bleed state and could cause problems with fuel flow, climb rate or whatever, then not only will they realise they shouldn't be playing with it but they won't mind asking next time either.
I know cabin crew prefer not to know a lot of what's going on but surely explaining things where possible can only help us to understand each other's roles better. We can help by taking an interest in what they're up to can't we ?