I will disagree - it depends upon the culture of the school and how the survery is set-up. If there is a positive culture (like at my school), then kids are very honest. Once in awhile there is a lie, but if you are good at your job, then you can see through that lie. Our staff is very close to the student body, and we know exactly what is going on, so if a student were to apppear on a list all of a sudden, with no other warning signs, then we investigate. We don't need to investigate that much though, as we are a small school with only 250 students - we cap it at this amount in order to be able to properly deal with all situations.
I realize that not all schools can do this, and certainly not the super schools that the US loves to build. Despite this, as I said, if you have a good understanding of the nature of your kids, even in a big school, you can tell, for the most part, who the bullies are, as they are bullies in school, out of school, etc. It is rare to have a school-only bully - in our vast experience as a behaviour specialist school, we find that bullies are bullies in all aspects of their lives.
That's not to say that what you are suggesting can't happen, but it's no big deal if it does, if the school is properly organized to handle it. If a name appears that's bogus, no one knows but the staff who is in charge of dealing with that, so it should't be a huge problem. It was for this school in question, as they have no idea how to handle this type of problem. They never should have taken the kids' info at face value and acted on it without proper investigation and observation. I can't even believe a school would act like that...
Tiger