This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
In this case you don’t hand him a machete, instead you murder someone innocent to prevent possible murders in the future by a third party
I guess it comes down to the weight you give the word “possible” in your sentence. If possible means extremely likely (and there are logical reasons to believe so) then taking responsibility makes sense.