They could be pretending or they could be people trying to find someone to harm online. Do not respond to angry e-mail, just send it to the moderator or the administrator. We will block that person from the board. We know that usually everyone will have fun and not run into someone wanting to harm them Online. But, let's face it.
Bad people do exist.
Also people do exist who simply enjoy doing bad things. So, make sure you stay safe and stay Internet safe.