Ah, a simple missunderstanding...
The answer to the original question is
Yes, it's possible, but it's extremely time consuming and not at all worth it. And, for what it's worth, it's a matter of changing the attributes of the modofied files to reflect the original date and time once the purge is complete. Now I'm sure that one of the Python Wizards here could probably write a handy little script that would make note of the date and time of each file and revert them back once the purging is complete but it's beyond my meager abilities. I'd end up doing it manually if I had to... can't imagine why I would want to... but, well, there you go.
Why do you want to do that anyway? Just curious.