Pretty simple to get them back, just tell them that if they don't give them back they will recieve no more alcohol and that the hot water will be turned off until further notice. And if they think you are bluffing also turn out the lights.
No point locking them in the diary room as they'd only bundle out of the fire exit.
This morning after all they were saying they still expected BB to provide them loads of booze, their rationale being that because they can't buy any on the shopping list they HAVE to give them as much as they want.
They need to be taught a lesson, most of them a small one, Kitten a bigger one.
And apparantly she has been given a warning, I do hope they show that on the show. Having her kicked out would be good, all this rebellion is taking us away from the others coming out as much. Although obviously they are doing so much better than last years.
They need to have a task but whilst Kitten is acting the little anarchist it won't work properly.