Something must be done...

Today, I saved Farmville from more than just the few broken windows that It recieved. Four griefers came online, and them, being noobs, were followed by me like Zac suggests. They broke into Farmville and started griefing, at which time I banned them as soon as possible. There must be a type of mod that can prevent such attacks. I try my best to prevent these, but cannot when I am not online. Something must be done about this and quicksmart.