If a 3-person law firm is suing you, and the law firm has a web site with photos of its 3 lawyers, it seems reasonable to add those photos to a pinboard at your entrance, so security staff know to look our for those folks, and not to allow them to come into your place of business (unless they arrive for an appointment, e.g. for a deposition).
What if the law firm has thousands of employees and you don't know exactly which ones might be working on your case at any given time? What if your entrance has a high volume of visitors and it's not practical for your security team to stop each of those people for minutes, whilst they check them against a set of thousands of photos?
