Well, I hope that they won't be back. It seems like it's the same spammer. This is not the first time. Last week, he created 3 or 4 different accounts/profiles. Each one with hundreds of posts. I reported some of them. Once that account or profile was deleted with all its content by the UNA admin, he created another one few hours later or the following day. Then I reported it again and so forth. That's why I started wondering whether the spammer is using some automated script or hacking technique to bypass the anti-spam system in UNA and add hundreds of posts at once. Many of those posts have the same timestamp.