I was a little shit in highschool and when asked a by military recruiter if I was interested in joining up, my autistic ass channeled the raw spite of the Vietnam and Korean war vets I knew and I responded "What ya wanna get fragged? There are far simpler forms of suicide." While I hold that I was well within my rights apparently the socially acceptable response to simply say no.
Also you aren't supposed to threaten to murder folks with wide eyes and a smile, I disagree.