If you had a contract to work for a company for a fixed term and the company changed hands and their lawyers came to you with a piece of paper to sign which they said transferred your contract to the new owners, wouldn't you assume that if you didn't sign that piece of paper you wouldn't hold a contract anymore? Or else why did they bother giving you a new piece of paper to sign?
Edit: Unless it was an IT code of conduct policy saying employees mustn't watch porn on work computers or something that WeeMac refused to sign....