I guess we'll get the official word tomorrow, but I am wondering why someone would WANT to hijack a FT monicker badly enough to make the effort to set up such a complete mirror site

Maybe embarrassing people is sufficient motive, but that would be about all you could do. It wouldn't let them steal from credit card accounts or anything else monetary.

If we were taking bets, I'd still stick to my original hypothesis, but there is certainly no harm in people being careful.