First of all, I said, "if you know you can't beat them." This isn't what I would do, of course not, but if you can't fight then what to do? Also, I took 3 of those martial arts back when I was 12. I practice Iga Ryu Ninjitsu as of now. I guess I shouldn't include the others. Anyway, if you can fight multiple attackers, then go for it. If you can't, what are you gonna do? Fight? No. You would die. Run? Yes. But, if you find yourself back into a corner, what are you going to do? Curl up into a ball and pray? If you want you could. Or you could try some phsycological warfare and try to fend off the attackers by taking away there will to fight . But hey, if you can come up with something better for someone to do, who can't fight and is backed into a corner, then I'm all ears.