I am a high school student, and while where i go to school isnt a very bad area, there are many kids that carry pocket knives with 4-5 inch blades, as well as other who carry mini stun guns, pepper spray, impact weapons, and there is also one kid the carries a single shot .22 short pistol. I am just wondering what the  best thing for me to have on my person is that i can not get into trouble for, because it is a very legal and simple object. I have been considering a type of tactical pen, but am still not sure if that would be the best option.