Contemporary folk would, I expect, focus on the bat-weilding thugs that went on a recent rampage rather than ones who did so in 1916, but how do you make the distinction?Choose something too contemporary, like a drone delivery, and you risk veering from the course of folk altogether.
Folk punk, just mention the Pogues and Roaring Jack. Folk metal.

Indie folk is so full of quirky talent that there is an impulse both to explore it and be intimidated by it. I won’t lecture on the folly of feeling intimidated because there are artists you like and respect working within a genre as, if I scratched, there would be whole genres that I avoid as not my thing. That said, the essence of indie anything is that you attempt it without too much reference to what others are doing.

Victim Statement

Being about my business I didn't notice  
seldom so unwelcome said accomplice
to the gang who had harangued and nearly hanged
all those read of claw and fang

You hear how weary defeat up and down the street
hardly discreet in descriptive deceit 
Carrying on in a cluster there 
Keeping away the customer

Being of temperate bearing 
I've done my share of caring
For those who care for nothing themselves
they won't find it on my shelves