Sam, I appreciate the help you gave me yesterday while trying to figure out a bug and by throwing yourself from a cliff repeatedly for scientific reasons, but you need to understand that what may be funny to you or a joke in your opinion may not be funny or a joke to others. When you mess with peoples' property or spawn monsters with eggs above projects they're working on or harass others while invisible, they're not going to take kindly to you. When you mentioned spawning eggs under LovelyLaces to me last night I assumed you were talking about animals, not ghasts and blazes. Spawning monsters on someone is in my opinion a circumvention of the /pvp command.
In the future, if you're doing something other than playing minecraft, log out of minecraft. Otherwise, staff assumes you are at your computer and seeing msgs and willfully ignoring them.
You can place a diamond block without having it act as a precious stone by simply crouching while placing it.
I'm going to change your tempban to 3 days. Please take this time to consider how your actions affect other people before committing the act. The next time you play "jokes" on other people or throw snowballs at them without their written consent in the server logs beforehand will probably result in a permaban.