Not really. If it had the same pose and was traced, then yes it would be stolen. But since the idea of wolves having swords is common ( don't know why since Its impossible ...) it's not really a stolen idea since numerous people have done it.
I'm not sure. I've seen a ton of users who send that exact message, and I've heard a rumor that the virus is what causes them to send it (Trojan Viruses steal information, so it could easily hack into somebody's account). You could report them if you'd like, but I don't know if it will actually help solve the problem. I think the best thing to do is just make people aware, which is what I've been doing wherever I see the message.