Characters who will not shut up!

This week's WriYe questions is about characters who will not shut up. Do I have any characters like that? What's the cure? Or is it helpful?

Actually I don't often have characters who don't shut up, and usually when they do go off - or when I get really into writing a particular character - they go where I want them to end up even if they do something different in the middle.

So yeah, sorry to be boring, but there's no interesting answer to that one!