Indeed, no one wants to pay taxes but the winners will still pay the taxes because they will get a notification from the local tax office about how much they have to pay.
Users really have to ensure that their personal data is safe and not give it to untrusted parties.
The last thing that winners thing about is taxes. The problem is that people get his winnings and spend it for his pleasure and next year tax inspections says him that it is necessary to pay taxes. But person has no money at all and buy such way he can become a buncrupt.