This concern is only relevant if you think that the only thing preventing the regulators from changing the signs is the technological hassle of doing it. If you

This concern is only relevant if you think that the only thing preventing the regulators from changing the signs is the technological hassle of doing it. If you rather believe than the signs change based on the need to accommodate a film crew for a few days like in LA, the this is a neutral change. In any case, analog signs are changes from time to time anyway, so the objection is not new in principle. The simplest solution is then use whatever method was used previously to resolve this.