I'm here to post a warning of a vandal that spans multiple projects. Here's a synopsis of how it went down from my POV:
[[b:User:Ivyboy]] and possible sockpuppet [[User:Dittoboy]] have been causing disruptive behavior while trying to impersonate [[User:Bulbaboy]] on at least en.w and en.b and possibly others. I was alerted to this when I saw the user trying to wikify a copyvio page (ripped from GameFAQs), then trying to delete subsequent vfd and copyvio notices and discussion from [[b:WB:VFD]] and the pages in question.
As I was the person who took notice, I had to let another admin do the work. [[User:User142]] and [[User:Frazydee]] (also an admin) have also been involved in this situation (as well as, of course, [[User:Bulbaboy]]). Ivyboy and Dittoboy have since resorted to vandalism in various parts of en.w and en.b, ostensibly in an attempt to prevent users at their university, [[Bar Ilan University]] in Israel, from accessing the Wikimedia projects (it's also to note that User142 also attends the university).
Action should be taken quickly. Since I'm a newbie-ish admin at en.b, I'm also looking for advice on how to deal with this sort of situation should it pop up in the future.