I like this.

1: Depends on the context of the situation in which the weapon was found. If it's laying on the side of the road or something then Blade would likely give it back, but if he finds it in a cave full of giant spiders and zombies he's gonna call bullshit and keep it.

2: Blade would give the children a chance to surrender, but if they don't they're going down. Though if they're really that weak he should have no trouble dispatching them with non lethal blows.

3: Blade walks away. He doesn't kill people over spilt drinks... unless the other guy starts it.

4: Blade- "I don't give a shit about the public."