We do check. Don’t set up accounts just to vote. See the “asshat” comment above.
The bottom line is that it’s an internet competition where the prize is an icon and a banner. Yes, you can very well get emotionally invested. It’s been known to happen.
But what you do is what you have to live with when the season ends. Why anyone would want to compromise themselves just for the sake of doing it or “proving a point” is beyond me.
You might disagree, but, you know that “asshat” comment? Go check it out again. Because it might do you some good to read it again.