I do not wish to keep any artist in the box, the opposite actually.
I just think that it helps with music discussion for me and helps to actually to see how an artist has progressed.
When I notice that Nine Inch Nails is less focused on Industrial Rock in certain of their works, I don't freak out about it, I simply take a note out of that and see what influences Trent takes from this time, I read up interviews to see what Trent was going for and what influences were this time around to make such a change in sound. I discuss genres and influences because I find them interesting, not because I wish for an artist to stay in a box, I would really hate that, as a NIN fan I feel a lot of frustration when people complain about the change of sound, I understand having a prefered sound from an artist, but most of these people do not even know where this "sound" comes from and what it actually consists of.
I also find it especially frustrating since most of them do not know how interesting the change of sound actually is, to see something like "Year Zero" be reffered to as a "Pop" record or something felt really frustrating to me and shows a lack of attention to the music some people give and simply dismiss anything just because it is not what they are used to.
(in general the way people just use Pop is frustrating, people dismiss a lot of music as Pop, just because it happens to have a melody but dismiss everything else.)
"Everything" is a good example, simply dismissed as a Pop song, when it is a clear love-letter to The Cure and its chorus is certainly very loud and rather aggressive, but a lot of people just don't seem to focus on music enough to make a note out of that.
A lot of people who throw genres around without knowing anythinga about them are indeed frustrating, but maybe if they knew little bit more we could have had a better conversation, some people totally miss the obvious Pop-song-writting that is withing The Donward Spiral or The Fragile and assume that NIN has always been some kind of purely Experimental Rock act or something, I've even seen people call "The Donward Spiral" "free-form"...which..no..each song has a clear structure.