OP, why do you ask?
There is always a risk. How much can you ever trust a stranger? Or maybe she's the sweetest girl now, but might resort to blackmail if she becomes skint in the future? Or maybe she's the most honest person on the planet, but a dodgy friend or boyfriend or relative of hers gets access to her records with clients' names (eg banking statements with bank transfers) and decides to blackmail them?
In fairness, I have always wondered if those who book long dates, especially trips, need to exchange details. If you have to pay a WG thousands of pounds do you do it cash (anonymous but inconvenient) or with a bank transfer (convenient but you'd know each other's names, and leave a trail). When you check in at a hotel, do you check in separately? In many countries a passport is required to check in, and employees will typically say your name: Mr Doe and Ms Whatever, welcome to our hotel! Etc.