The nature of an IFB church is in the I, not just the F. That is it is independent. You can't lump them all together. I know of one church that didn't allow a person to preach if they had wire-rimmed glasses. Does that make them a cult? No, it is a standard that they held to because of a conviction that the pastor held, that he believe was based on the Bible. We believe in soul liberty here. We don't mindlessly follow a denomination.
If an IFB church sets as their standard ankle length dresses (as they did in the Victorian age), who are you to say it is wrong? Can you prove from the Bible it is wrong? As long as it is not a requirement for salvation it is not a cult. If they believe it is a step to holiness they have every right to have that standard no matter what your opinion is.
Every church is different, and all of them have different standards. You have no business sticking your nose in them and telling them if they are right or wrong. If you don't like then go somewhere else.
The utter irony is that you're
relativizing things for them. "it's OK if it's their
conviction". But the problem is, churches like that don't return the grace. They usually claim that IS the Biblical standard, and that they are not just to maintain biblical standards, but to actively
oppose any lower standards. So they put a tight yoke on their followers and then spend all their time sticking their nose into everyone else's business (even if indirectly). If others appeal to conviction, even by the spirit, they trample it into the ground, claiming only the written Word is the standard. Yet, they can make up any rule they can think of, and tie it to a verse or whatever by the flimsiest thread of reasoning and then justify it as "conviction" when the "scriptural teaching -- er,
principle" argument runs out.
The hook is that they don't usually stake
salvation on some of those rules. Still, they make it a matter of
"obedience", and claim everyone else is disobedient. They will point out that some of these "willfully disobedient" are '
probably' not saved, and that they all therefore need to "check themselves". That to me is a sneaky way of denying everyone else's standing in the Lord without actually "crossing the line" into works salvation (and they'll also be the ones criticizing others for "trying to come as close to 'the line' as possible instead of really doing what God says".)
Example is the school with the interracial dating rule that was grudgingly removed two elections ago. They had a history of condeming everyone else as "opposing God" (on this, and other related issues such as music), yet they and their defenders claimed "
liberty"; which they pointedly denied everyone else.
Either it's Biblical or it is not. That's the standard they used on everyone else. Either 2 Cor. 6:4 includes the parameters they were using, or it does not. No relativism. No one can
make anything biblical!
And then, what about the
testimony it gives, and whether it is really "expedient" to the work of God (
1Cor 10:23). Not even given a thought, though this again is preached at others, (including students regarding how they use their time).
Yet we see in practice in these cases it is the preacher/teacher is the one who determines what is right or wrong, and who gets liberty. That is too much power people try to appropriate. Hence, cultlike, whether they deny people's salvation or not. (Many cults don't).
A lot of this stuff is all self-aggrandizement anyway. Everyone wants to be God's spokesman to preach everyone else into line.
What people preach always manages to make themselves look good and put a burden on others! It seems correcting others is what the faith is all about to many; and hence why so much dissension.