No credit given

I'm usually not too much of a stickler for these things, but I've noticed multiple instances of people lifting my work to use in their own works, without giving credit to me. As long as it's for non-commercial purposes, I probably won't say no if you just ask, and even if I forget to answer, feel consider the act of asking as basically getting my permission.

But because I'm feeling evil today, I'm going to list some stuff I've come across where people have uploaded stuff that has used my work without contacting me.

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This Cornerian seal seems to be popular, where I took the original and added the rope-like ring around the globe and fancy-ified the star a little.



This video uses it.


This guy is using it too:


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This is an ancient one, where I thought I could make the Arwing look cooler with my own take on it, but never got around to finishing it:


And here it is in a work by someone else, except flipped horizontally and finally given some more details!
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I'm not asking these to be taken down ... just let me know if you ever use my stuff again in the future. Thanks!