[Mark.B]

Yes, that is true, it works anywhere and for anyone.

I daresay there will be ways of easily adapting that code to work only in specific circumstances, but I'm no coder so I can't do that.

Of course, other users would need to know the code that generates it, and you can easily amend it from [username] to something completely different just by changing the code I posted.

I used it on my forums a couple of times as a complete joke. It's quite tricky for an average user to suss it out, as it doesn't even show the tag if you quote or edit something. Nobody from my site sussed it, although I cannot say how much anyone was really that bothered!