If you'll note, I didn't make any claims about Ieralaine; I was merely commenting on the general process and how it can work.

Previous Characters? I really don't think you can do this very accurately over the span of months.

I disagree, though some players might require more interesting pattern matching to track. That said, even dynamic IP addresses do not necessarily change very often. In the case of Ieralaine, after having looked, I have no doubt about previous characters who share the same IP from a provider where I would not expect multiple user access. Were it appropriate, I could list--according to IP matching--Ieralaine's previous characters and I think you would find the pattern very compelling.