But surely you can't fake the date of joining or the number of posts? That tells me that Whiffey is Whiffey (and not the Whiffey with a funny "e" in a foreign font from a few weeks back).
Oh no, I'll give you that- the info does tell you how long someone's been here and their post count (mines into silly numbers now), so technically you'd know if someone was a sparkly new user or not.