I wish people didn't used Twitter for contests, it's not transparent and you can't audit it. You can just have a bunch of bots retweet you, or anyone can claim you delete a tweet, etc.
I wish people didn't participate in contests on twitter because I read twitter to see what my friends are up to, and not which products they are using.
I have a second twitter account that is followed only by me for this kind of bullshit. If more people did the same, we'd get fewer companies encouraging Twitter pollution, and consequently fewer children crying about how they got 'scammed' on HN.