So they emailed the address given, IN ALL CAPS, complaining. I replied, explaining they should bookmark and login at the front page, not random pages in the game.
Then our Internets connection was killed at work (current scuttlebutt is that BT themselves may have deep-sixed their own service in order to get overtime fixing it) so it was until I got home that I found the second and third emails they'd sent, lamenting our lack of response and describing the situation as “bloody silly now!!!!!!!!!!!!!!!!!!!!!!!!!!!” and “not good enough!!!!!!!!!!!”
I'm guessing from their aol.com address they don't have a whit of an idea how to control the spam filter >_<