I'm no computer technician, but I believe it is difficult to detect a user skilled in computers who wants to open multiple accounts, so it will still happen.
Exactly, it seems to me that with enough knowledge about computers to pull it off, someone intelligent enough to keep up two or more multiple identities without suspicion could do it!
I was asking as I was thinking about this forum the other day (bad move, I know), and when I was on here more regularly in the past, I do remember seeing 'new' members who would suddenly appear and burn brightly, who also seemed somewhat to make me go 'Have I seen you before?' and who would have an overfamiliarity of here that only comes with the true awfulness of being on here for a while..... And then they would disappear again. I used to sit and think, who are you exactly?? How do you know things?? And more importantly, why do I think I have seen you before?
Classic was telling me about someone who forgot his details, etc, so, I concede there must be an element of that going on, but for others..... Do people really spend ages browsing on here before joining, therefore accumulating lots of info on people etc?? I know I didn't!