It certainly shouldn’t be possible to reset one’s own bounce score completely freely but it doesn’t seem totally unreasonable to allow this with restrictions. For example, it might be that users should only be able to reset once after the last time they didn’t bounce or that it requires email validation similar to activation in order to reset (and only allow sending that email once)
That’s probably for a separate Contribute > Feature topic though and I don’t personally feel strongly enough about it to write it.