Do's and Don'ts for Non Union Writers

The WGA says you can seek representation, but no, your material cannot be moved. But then there's also the idea of discussing strategy about moving it, so that goes into a gray area too. All right, a couple more questions about do's and don'ts. So what about the writers who are currently under contract with non union companies? For example, Hallmark. What do they do? They should talk to their lawyer and their representative and talk about any exposure that they have or not have.