I don't see how that is enforceable except in circumstances where the creative content of your work is in some way related to what the company is involved in (w

I don't see how that is enforceable except in circumstances where the creative content of your work is in some way related to what the company is involved in (which can be expensive for a large for a multinational corp., admittedly) For example, the photographs of your family taken by yourself. Would you expect your employer to retain copyright?