If we talk about Noise\Industrial in general, then, as a rule, everything depends on the context in which the author puts his work and on the perception of a particular person.
Harsh Noise, as mentioned above, is quite flexible in this aspect and often you can change the cover, change the track names and get a completely different impression of the same material. Often, but of course not always. There are projects, in which the author uses nature sounds, such as grass rustling, wind sounds, etc., which are distorted later to unrecognizable extent. And what supposedly should sound like something life-affirming sounds aggressive for an unprepared listener, despite the fact that the source material is field recordings of nature, and on the cover instead of corpses and blood, for example, the same nature elements or a nice photo of the author. On the contrary - some Industrial, which is quite soft sounding, can be perceived as something sinister, due to the relevant design or concept.
In Death/Black metal you are still limited to certain themes, usually related to the dark aspects of the human psyche, or reality in general. But not always performers working in such genres pursue the purpose to glorify death in any of its manifestations, for example NSBM carries a "positive" message that death, destruction, etc. are necessary to achieve the "higher purpose", whatever it is expressed in. That is, all "negative" aspects serve to achieve a "good" for a certain type of people. Grindcore is not always about bursting skulls and guts, you can find a lot of politicized bands that are "positive" in that they highlight the problems of social inequality, fight, as they believe, for someone's rights, etc. But for a person who is not in the subject, it's all just a lot of noise with crazy screams that he want to stay away from :) And in that respect, all of the above genres are, of course, inherently negative.
