Well some of my friends on the Adult Swim Message Boards helped me solve the code in the last message.
The code: 492057494c4c2046494e4420594f5520414731494e
Translates to: I WILL FIND YOU AGAIN.
Pretty creepy, but there is no evidence that it is even aimed at me. I shouldn't be so paranoid. I just don't want what happened before to happen again. Well I'm sure I'll be safe. This mystery seems to be solved now!
Special thanks to ZeroStralem, Runescapian, and itsacoaster for help solving this riddle!