"it helped open my mind"
What did it open your mind to, exactly?
It helped open my mind too... but not in the same way as some others...
It has helped me to learn to take a step back and look at something that I have previously held as truth and ask myself: "Why do I believe this?" "What personal experiences do I have to justify my faith that 'such and such' is truth?"
It has helped to open my mind to consider other possibilities, no matter how ludicrous them may seem to be... and I have learned a lot about debate and rhetoric and even got a chance to hone some of my logical processes.
They have failed to convince me (yet) that the earth is indeed Flat or that there is some grand conspiracy to keep people thinking that the earth is round instead of flat, despite all of the flawed experiments/conclusions and circular logic that I have witnessed.