I use a Sony Ericsson W910i and it was very easy to sign up to facebook using a mobile phone. I have an internet bolt-on so i can browse google, Msn, facebook, bebo i do most of it using opera mini 4.1 all on my mobile phone!!

The "victim" does not have a PC yet has a Facebook profile ?
If, by PC, it is meant a home computer (Mac, PC, Linux, Xbox, PS3, whatever), then how in the world does she maintain a Facebook profile ?
If I were her boss I'd have her and the network admin in my office within a minute for some serious questioning.