Or, just add an insignificant name (changing someone's name might run you afoul of contracts, even in a review copy).
You want to make it so that the entire binary content of the film looks different for each person, so there can be no point of reference apart from what it looks like (which is the same).
But yes, once it was discovered that information was being embedded in the credits, those would be cut.
But in this wide world there are fans who painstakingly go through the credit and put the text online. Sometimes even special thanks. So a fake name could be detected, and once the m.o. is detected, in this networked age, everyone would know it and people will start looking for it.