Most Christians are aware that Catholics are not allowed to read books unless they have the papal imprimatur or sanction of the pontiff. I'm pretty sure they can't write without approval either, it would seem. Now, as a Protestant, I can write a book on the Bible and publish it without getting a church's approval, though it might be unwise to have no one advise or review it. It would be a so-called "sin." When a preacher teaches he mention the caveat that the listeners shouldn't take his word for it but be "Bereans" and search things out for themselves in a noble manner. The teacher is indeed responsible to God but that doesn't deduct from the student's responsibility and he can't pass the buck and say he was just following the leader like they did in the People's Temple with Rev. Jim Jones committing suicide (by the way they found no Bibles at the campsite).
Families are encouraged to hold Bible studies with the father being the spiritual leader, and it is alright for brothers to get together and hold an "unauthorized" Bible study. What we mean by "authorized" is open to debate. I hold a Bible study that is announced in the church bulletin and one of the church members is acting as an "elder" is in charge of activities and spiritual leadership, et cetera. My old pastor thought it was great to have a Bible study and even thinks I should start one at the Vets Home. I think we are to encourage each other in the Lord's works and not offer positive feedback and bless each other and not criticize each other's ministries.
As it says in 1 Cor. 4:5: "Judge nothing before the time." That is why I refrain from judging para-church organizations such as the Navigators (having been greatly influenced and indebted to them while in the Army). They act outside of a church's authority but encourage you to attend your own local church and not be dependent on them--likewise, my Bible study is composed of people from different churches and I encourage them to assemble regularly so as not to overly influence them and take away their discernment. I am also under authority by being the member of a body of believers, and there would be no way to go off on a heretical tangent or off the deep end into apostasy without my friend Nick catching me in the act.
There comes a point when you have to step out in faith if you want to do anything for the Lord. In a sense I am a true Protestant: "I dissent, I disagree, I protest." Luther said to go against conscience is neither "right nor safe." Soli Deo Gloria!