E-mail, text, Twitter and the internet make it tempting, and easy, to express an opinion, pass judgment and critique your employer in public. Everyone will have felt the urge to have their say when the boss has done something silly. Leaders need to recognise it is impossible – and undesirable – to keep a lid on employee opinion.To avoid painful and embarrassing public challenges such as this, companies need to create trust and transparency inside their businesses. Leaders should share their thoughts with staff, solicit intelligent questions, encourage debate and dialogue and, hardest of all, learn to tolerate dissent. That will go some way towards reducing the temptation of using the letters page to tell the boss what you think.