Right in the agreement our models sign before they come to work for us, we make it clear that attitude is a non-starter, and we will send them home if they cause problems, act unprofessionally, or are otherwise difficult or unpleasant to work with.

We've also eliminated otherwise cute models from consideration if, during our initial conversations over IM or phone, they've shown attitude.

There are plenty of beautiful models (or wanna-be models) and we have way more applicants than we can ever use to warrant working with someone who is difficult.