If a person is alive, and invites people over, but does not frisk them. Is he not invited someone to stab him to death? At some point there is reasonable expec

If a person is alive, and invites people over, but does not frisk them. Is he not invited someone to stab him to death? At some point there is reasonable expectation. On all websites worth their salt, input fields are labeled. An input field is not an open invitation to hack the system and bypass it's actual use. Also, haven't people learned by now that debugging other people's systems can either be rewarded or punished? It's not worth it unless the company has very publicly stated a hack me invitation and reward system.