Simply because a person who has become a whale by building up enough steam power, it shouldn't give them the right to go around and basically rip money out of people's pockets.
Look at the record of this user just going around downvoting posts left and right:
https://steemd.com/@liondani
I could see if the occasional post were just complete garbage, but he's going down a person's blog list to downgrade posts in bulk. The one guy @miketr who he hit today has been trying to help the community by building a faucet to help everyone. And even when his first faucets didn't pay enough, he paid out of pocket to keep his promise of doing 0.020 SD to each person who upvoted and commented. I don't know the guy personally but I think he got a real raw deal today at the hands of @liondani who took it upon himself to decide that he would just squash the guy's efforts outright.
Sorry I think this is just totally wrong and goes against what steemit is all about. There needs to be a way to keep people that become whales in check because as it stands it's just way too easy for them to influence things in a huge manner up or DOWN. Spread the wealth through creativity & activity is the idea. Not to allow an elite few play ultimate judge & jury on anything that doesn't fit their fancy.
Post your thoughts and opinions.... but I'm really discouraged by anyone doing something like this. And makes me question the future of this community if people with massive power can just call all the shots at their own whim with a click of a button.
We need ways to improve this or it will just keep getting out of control.