That is just another example of "It's only a problem when it's not in balance."
If you're the only one it ever happened to, yeah that's a problem.
But once it's happened to everyone or at least everyone knows someone that it happened to, then it's no longer any more of a problem than any other problem.
It just means eventually it becomes normal to occasionally start building a new reputation from scratch. No one will trust a new identity with anything important, but also everyone knows it happens so they don't assume the worst either, and there are ways to start rebuilding your karma, and it's just a garden variety hassle not the end of the world.
Like a new ebay account. For every problem or "think ahead" there is just yet another a little further think ahead.
Point being, it's not that there are no problems, it's that whether anyone likes any given new development or not, once it exists, it exists. It's part of the world and cannot be un-created. Whatever the problem is, there are many possible responses, but one response that is absolutely not available and uttery silly to waste any breath on, is "this shouldn't exist, make it go back to before it existed".