Some one register on my MU website, and then he create a new blog whose title is links to his website. I don't know how he do this. Is my website hacked?
This is not the first time he do this to my website. Last time I just deleted his blog and membership. But I am afraid he will do this again and again. How can I prevent this?
I haven't delete his blog this time, you can visit my website(http://iivee.com), you can see some of the titles in Updated Blogs turned to links to other websites.