I hope you realize that its against dA policy to post art that has not been created by you yourself. You'd best delete the pictures you've posted up here before someone else comes along and reports you, deactivating your account.
dA is not facebook. You can't just come along and post someone else's hard work and think it'd be nice to share their stuff, because in actuality, you're posting their art in your own name.
Please delete those pictures from your profile as soon as possible.