They're doing their stuff.
Just passing on a message!
One of the causes was a link in a comment. If you draw original work and get a comment saying something was stolen or copied and you're given a link, DON'T TRUST THE LINK.
Do yourself and others a favor by hiding the comment just in case. Yes there's a chance someone actually did take your art, but there's also a chance someone is faking it to hack your account. This is what happened to one particular artist I know of here on DA.
Also, if someone you watch posts a journal, or if you see a journal, with links to things inside it regarding the hacker issue: Do not click the links. Only c