Murder, for example by Curb Stomp, Longshot Headshot, Lancer-saw Shredding and Boomshot Oblivion, are just a small sample of hilarious types of Grubicide.
Grubicide is certainly not a punishable act under human criminal law, in fact, it is very much encouraged as the chance of extinction of the human race would be very much likely without it.
Marcus Fenix: For f*ck's sake Dom, stop being a whiny p*ssy! These Locust pr*cks are coming toward us! It's time commit some serious Mass Grubicide!