Want to know why they are mostly low level? Lets see back in lets say 2006-the beginning of 2007 there was a method of getting rare names by saying that you havnt logged in since classic you moved as your dads in the navy etc. It worked mostly everytime. Thats why all these rare names suddenly just sprung up from the pit of runescape. Most of them did this trick to get these names some are the true owners but most arn't.
Many many many moons ago, probably around early days of RS2 I remember dying and walking towards draynor and I saw, "the devil". Was awesome, but too noobie to take a screenshot lol.