Pro Tip /res SET firespread false (this will prevent ANYTHING from spreading - exception of lava and water flows - /res SET flow false for those) Also, remove permissions once its done - you are responisble for your own plot.
Griefers that happened to me once i hired a guy to help me restock some of my diamond i had only a stack left then came back after mining out my diamond ore with fortune pick come back 3 mins later and my diamonds were gone.
Just because someone burned it down doesn't give you the right to go rage mode and start swearing and breaking the rules I hope you learn that from the day you've earned away from us.
That's terrible. Your pagoda was really cool, though. I hope you rebuild it twice as big, and also that you learned a valuable lesson about giving out perms on your residence.