Purple ball wins that battle. 9 times out of 10. And guess what, he's wandered into their school of purple balls and they now they have a taste of saiyan. They've talked to themselves.. They've communicated and said 'You know what, saiyan tastes good, let's go get some more saiyan'. They've developed a system to establish a war-head and aggressively hunt them and their family and they will corner their friends, their children, their offspring.