Every now and then I receive a whisper from a player named Ninfaegenia stating that my account will be temporarily be disabled and that I need to visit some kind of website.

Now I know this is fake, but it really irritates the hell out of me to receive this whisper every five minutes...

What can be done about this? I suspect they want to hack people's games and I don't want this to happen to anyone.

Thanks

rightclick on the name and select ignore

Or use the ingame report system and report the idiot.

yes, report all of them.
Bastards.