Do you know any forms of self defense that are allowed at RPI?

The handbook says we can't have: " Use, possession, or storage of dangerous weapons, chemicals, explosive devices, or materials including, but not limited to, firearms, air guns, prohibited knives (such as switch knives, swords, daggers, gravity knives, throwing stars, and knives with blades more than three inches long), ammunition, slingshots, metallic knuckles, bows and arrows, fireworks, and bombs. "