Yeah, that happens. One of my close friends is disillusioned with the government, and usually just uses the ballot paper as a way to "politely share his thought

Yeah, that happens. One of my close friends is disillusioned with the government, and usually just uses the ballot paper as a way to "politely share his thoughts on the matter" with whoever is unfortunate enough to read it. They don't verify that a vote was cast, just that you showed up.