The best bully defense is an overwhelming and unrelenting offense. Yes, I realize there are many reasons why bullies bully. As one who was bullied constantly up through middle school, the only thing that made them stop is when I lashed back. Not mediation; not getting teachers involved; not ultimatums. Make them regret choosing you as their target.
Not really, but both grooms gave me a verse to read and they pretty much gave me carte blanche for the rest of the ceremony.