Thank you for your suggestions we will consider them.
I'd just like to remind newcomers that you should read FAQ before trying to make 100 accounts as some people are now trying to do. The only result of this is you never winning anything as you are now flagged and banned from participating.
Why ruin a good thing?
No doubt there will just be more of this in the future.
Measures that can be used to prevent this, apart from keeping an eye out, as you already are:
Only accepting people with active users on this forum, or other significant bitcoin-related communities, having email confirmation a requirement + captcha.
Also, who is the new winner?

I can only see it says completed now, and there is still just 2 winners!
Timer depends on the time zone since it counts down to a specified time and date. There are 5 hours and 22 minutes left as of now.