Luckily Jools that doesn't happen much. The adult inmates are normally very nice and polite, and just enjoy a chat. Some of the YOs try and act a bit more "clever" but TBH it is normally only when they first start the class. After a session or two they seem to realise what I will and will not oput up with. Generally though it is a nice environment. I don't ask what they've done and remain oblivious at times (others tell you themselves). And they are geranerlly very nice towards me, regardless of their past crimes. I have to treat them normally though, not as criminals obviously.
Have to say though that I did almost lose it that day - it was the session I ahd with them following having had my wallet stolen from ym bag whilst out shopping, so it was very close to home.
BUT I don't know the answer to these kids and how to stop them. Wish I did. Has to be much tougher consequences, better parenting int he early years to start with thogh.