It really depends on what kind of work/education you're going into.
If you're looking at the ever-so-lusted-for career in "game design," then it may be wise to include it (even if it's not your best on the list).
However, if you're going into a field that is more complex and programmatical, I would strongly disadvise including this in any sort of serious or highly-valued application. Why?
Well, for one… ROM hacking doesn't even begin to penetrate the depths of genuine programming and software development. The absolute best you'll see out of this hobby is the work of the Assembly Magicians, and of the Reverse Engineers, and that's about it. Even if you have some insanely popular hack or whatever it's not really worth a mention because it's not quite… relevant? I think that's the word.
On the other hand, there are plenty of like-minded hobbies out there that better grip the ideas contained in Computer Science – for instance, 3DS development (which is ever-difficult due to Nintendo's anti-piracy measures). A lot of that work is in its infancy due to how new the sect is, which means there's a lot of extremely low-level work to be done… if you're interested that is.
You may not be, and that's fine too. The bottom line is you need to gauge what you're doing and discern whether it's right to put on an app or résumé. I've explained a good bit here, I think I've covered most everything seeker up there didn't already go over. Hope I helped :)