Ok, the cold hard truth here, If you put something on the internet out to the public, expect it to the inspire others. It just shows they enjoy your work and want to learn from it, that's what being a Idol is about. "In a recent decision of the Full Federal Court, the Court reaffirmed the fundamental legal principle that copyright does not protect ideas and concepts but only the particular form in which they are expressed. The effect of this principle is that you cannot copyright a style or technique. Copyright only protects you from someone else reproducing one of your actual artworks – not from someone else coming up with their own work in the same style."
You can become known for doing something a certain way but you can't own it, you can only own the work as a whole. The same go's for characters, if its just similar not the same copyrights don't apply, even more so if its a generic design to began with.
So people stop bother the DA staff with this nonsense, If you report a stolen "style" or similar character, Deviantart Help staff is not going to Help you , Because nothing was stolen you don't own the "style" and you don't own every Red Doggy with a purple scarf.
Sending your white knights after others inspired by you or like you by coincidence , makes you weak and childish.