Never pick a fight with an ugly person, they've got nothing to lose. Robin Williams
Well, a girlfriend once told me never to fight with anybody you don't love. Jack Nicholson
Those who have the immense dishonesty to fight with a ballot box in one hand and a rifle in the other have no place in democratic politics. Neil Kinnock
It's better to pick a fight with your in-laws than with your neighbors. Hindi Proverb
They who fight with golden weapons are pretty sure to prove they are right. Dutch Proverb
Don't fight with the strong one, don't sue the rich one. Russian Proverb