I want to start 3 forums, but not at same time. One next week, another after one more week & third one in May so I was thinking to start with phpbb/smf and then in May buy vbulletin license in bulk when my third forum would be ready. But I am confused after reading many phpbb forums hacked incidents that it would be safe or not. Is it safe to use phpbb? Or smf is a better & safer free forum script? Or should I start with vbulletin itself?