A habbo.nl user used a bot program in the hotel wich caused laggs. Habbo reported it to the police, the police went to his home and he had to come to the police station. He was suspected from phishing and DDos attacks and the police took his computer for research.
Today he had to come to the police station again, he got his (empty now) computer back, a warning and a ticket of €530.
So if you're thinking about using these programs.. don't.