@qqtt991 I’m referring to requests specifically denied with the reason in the OP, most of which have happened within the past week.
@Zabazz Extuls already gets my points down, but I will add that there is nothing to possibly take out of context about my image (available below), so I would like to know why it was denied if it weren’t for the given denial reason. I don’t particularly argue with moderators’ judgement itself.
Earlier today I was wary about talking about other peoples’ requests for their privacy, but I do believe it’s important for the matter, if they don’t mind.
Using the search feature, I see that this reason started as early as February this year, notably with Dogutsune’s bandana request. It did result in a 3 day ban, the moderator’s note only claimed it was an inappropriate image. I speculate that it was denied for gang relation, but this is never actually specified as per the point of this topic.
More recently, RealNoobBot was temporarily banned for uploading a Decal of the phrase “Sam is a weeb.” This is one of the only cases with context (anywhere along the lines of offensive language, the last word is in fact disallowed on Roblox), so it was okay to use this generalized response there.
The request I largely had in mind writing this topic was KingBr1ck’s screenshot Decal that was reviewed 8 hours ago. The only reasons I can guess is either that the text of the players’ usernames are problematic, or their clothes are - and even then, they are in fact approved shirts and pants.
And this is the image of two lights I uploaded, though smaller and with a backing for visibility (originally transparent). The other uploaded Decals feature different brightnesses but are otherwise identical.

As qqtt991 and Extuls have also said their piece, my main concern with all of this is that we’re unable to take it upon ourselves to fix the image and upload a new one if we don’t know why it was rejected to begin with, and at the risk of facing punitive action. This response assumes we’re already aware of what’s wrong with our asset.
I don’t even care to have my request re-reviewed, I simply don’t think this denial reason should be used, at least without substantial context (e.g. the developer received a warning for inappropriate language).