Ignorance goes both sides though, free and open source has dark aspects to it. The assumed security has no one to hold to account, and for profit companies has real leverage over projects and can hurt the ecosystem if given a chance. Add to that how lax the wider community attitude is to breaking licences and you have a ecosystem that can fail if all you do is assume good faith.
Remember to keep an open mind to everything and not just the things in life you have a particular issue with. Everyone is ignorant to something.