I looked quickly and I haven't found such a function or button, though perhaps there's a forum mod out there that could provide such a thing. So far the forum doesn't have too big of a spam problem, so IMHO I'm not too worried about "sleeper spammers" that are registered users but somehow had never yet actually posted anything. Once the user dares actually post a spam, we'll see it pretty quickly, remove the offending posts, and immediately ban the user for good. For now if you want, I guess maybe you can PM me and namida a list of problematic silent users you've noticed, and we can preemptively ban them now on grounds of having spam links on their profiles.