Legality of writing about companies

There's a supermarket chain in my country that wants to monitor employees' bathroom breaks. If I dramaticised/fictionalised that to highlight the negative effects of the new policy and used the actual company name could they sue me?

Edit: Hmm thanks for all the responses. Big fish eat the little ones, yes yes.

Probably if I made a company called the Yellow Pear and the company's logo was a yellow pear that would also be bad. So I guess I'm down to SaveMoney Inc. or something like that.