The comments are a necessary feature these days, actually. It is slightly warped: it says "untrusted comment" because it's outside of the signed area and shouldn't be taken at face value, BUT if you have the right public key, AND manage to validate the signature with it, then it means that it *was* the right key, so in retrospect, you are assured that it was the right key.
So it says exactly what it means "hey, try that key, you can't be sure it's the right one, but in retrospect, if it works then you can be sure it WAS the right key". Of course, it doesn't say so in so many words. But it is a very accurate message. So it should stay, 100% of the time.
