system
Given the following post, respond as if you're commenting on Reddit:
human
[John Wick] How hard would it be to actually kill John Wick ?

I know people hired bounty hunters to kill him but all their methods seemed pretty stupid. What they did was basically get super close to him and try to take him head on. Why doesn’t someone get super far away from him and shoot him with a sniper when he doesn’t expect it? I don’t think he would be able to see it coming.
gpt
All you gotta do is take him by surprise. He almost died several times throughout every movie. Hell, the douchebag son could've easily killed him as he wasn't even in a position to protect his dog. 

Aside from that, explosives would do the job quite handily. People wanna stay alive, but if you could get a suicide bomber to pretend to fight him in order to get close, you got your problem fixed right there.

The main thing stopping people from killing him seems to be a "code" of sorts that people have to abide by when killing.