You could, but IMHO it's a terrible idea to add after the fact. Like, yeah if I had a time machine I would want to change it, but trying to change it today, eve

You could, but IMHO it's a terrible idea to add after the fact. Like, yeah if I had a time machine I would want to change it, but trying to change it today, even and perhaps especially in a cosmetic way, would just lead to confusion, ambiguity, and security problems.