To be honest, I have created a texture or two. I've seen people using it but not crediting but you know what, it's fine. As long as they do not steal it it is totally fine for me.
But I get watcha mean, although in my protection, because I do it to, I will explain the reason I do it. Sometimes, I use meshes and texture skins of people I do not remember. So, to save me time and not trying to be rude or look like a thief, I just say 'credits to their rightful owners.' even if I do not remember it, I give credit. A credit, not matter what it is, is a credit in my opinion, now if it has a name it makes it more official but not mentioning you, yourself on it, doesn't mean they do not credit you so I do not find it bothersome as long as they don't steal and respect one's work, for me atleast ^^
On the other hand, I can understand that when someone is being rude, like 'I do not like this, it sucks, you suck' and think it is a feedback but sometimes we, the creators, missjudge a message. I mean, sometimes people don't like something ok? When you ask feedback or not even, below in the comments, there will be people who will say they like it, some will give you tips to improve and some will make a strong criticism on something but it is totally objective objective, not being mean or anything, yet some just do it to because they're jealous. Now of course if someone comes say 'I didn't like your work because I saw the current flaw that was making the whole area look glitched or had a bad appearance and not so appealing to others, I edited it. I hope you're ok with this.' I know it might sound rude but the person has reasonings to say this and acctually stated that something in our work is lacking of efford, we may do our best to do something but sometimes it is not as good as we think.
Before you claim that 'wait til it happens to you' I can say that it has happened in previous works. Sometimes requested feedback doesn't even happen and I struggle in finding mistakes to my work. I am finding flaws on my textures and creations everyday and nobody mentions anything, maybe they don't use them because they dislike it, I understand, but when I ask for someone to help me and they stay silent my work is half done and has bugs/glitches/problems I do not see at first but find later when I use them myself. But that's ok, I mean, as long as I spot them it's ok.
I do not encourage mean comments as feedback but I'd just tell you to not mind these stuff and be proud your work is being used ^^
We will improve at some point if we keep trying for the people who respects our work ^^ I personally work for the people that support me, not for the ones who are ready to spawn hate.
Sorry if my comment was rude or mean-like comment, Ihad not intention to sound mean, I just wanted to say my opinion on that matter ;w;