Don’t use my art, unless I give you permission. That includes using it as an icon.
I’m specifically saying it here because someone has, and I’ve waited long enough for a reply on one of their accounts, and given the specific image they used for their youtube, they either follow here on my tumblr (or ask blog, I’ll reblog this there too), or my old twitter.
Do not use my art. I do not give you permission. I specifically say not to in my blog description, in my Deviantart descriptions, and even if there’s a place where I don’t say it, do not consider that automatic free to use permission. The only way it would be is if I SPECIFICALLY say that something can be used as an icon or whatever.