Aardwolfe hit it on the nose (ouch!) as far as why I have some minimal fishing gear in my mini-PSK. I may never, ever, need it, but ... my philosophy on survival kits, and survival in general, is that it is better to have a little bit of something than nothing of anything. The fishing line can double as thread, snare loops for small animals or birds, or even (!!!) fishing line. The hooks, well, the only dual-use I can see for them is snagging the next over-zealous, fat-fingered TSA screener I have the displeasure to meet.