Many years ago when I was in my 20s, I was in a nondenominational church that made a really big issue of "dressing right" for church. I was always in trouble there for the way I was dressed. I did not have any fashion sense and I was single - I did not have a better half to help me with clothing selection, laundering and ironing, etc. In those days all men had to wear a suit to church, and I did that, but there was always a problem - my suit clothes were not the right fashion or color, the suit pants had wrinkles, even after I ironed them. On at least one occasion the pastor rebuked me by name from the pulpit, saying my clothes looked like I had slept in them. Finally it was decreed that I was not allowed to do my own laundering, that I would have to take all my clothes, even those that did not require dry cleaning, to a professional laundry. I ignored that rule and the pastor rebuked me for it. (Likewise, I ignored the rule that you could not come to church in a dirty car - you were supposed to run it through a car wash before coming to church).
The reasoning for these rules was that coming to church in a less than absolutely perfect outfit or a dirty car would be a bad testimony for visitors, but we had almost no visitors, and our cars were parked in the back and any dirt would not be visible to passersby on the street. Over the years, I was regarded as a miserable sinner and a rebel for my lack of compliance over such ongoing issues, especially the clothing issue, and the problem was finally resolved only when I left that church. In recent years, many churches in general, including IFB churches, have relaxed their tight standards and are no longer bullying and heckling their people over the issue of sartorial excellence, and in my opinion that's a good thing. However, based on the videos I have seen posted here on the FFF, some IFBx churches are still obsessing over the clothing issue, especially with regard to the ladies who are not "dressed right" and are supposedly tempting those horny IFB men to commit lust.
Why do some churches (IFB, non-IFB and anti-IFB) make such a big deal over the clothing issue? They say it is because we have to honor God in His presence in church, just as we would dress up for a wedding, funeral, court appearance, etc. That sounds good, but I don't see a scriptural basis for that as a requirement. Could it be that the real reason is that it is easier to control and manipulate church members if you can put them on a guilt trip on the clothing issue, or anything else you can dig up to make people feel guilty?
Yes, I agree, we should show respect for God, for our pastors and for our fellow churchgoers by dressing for church in a decent, cleanly, orderly, respectable manner - no bikinis, grungies, dirty T-shirts, shorty shorts, etc. But let's not go to extremes and humiliate people unnecessarily over their manner of dress. There must be a way we can avoid going to extremes, in one direction or the other, on this issue. As for the ban on women's slacks, it makes no sense in a society where 99% of all women, including Jack Hyles' daughter, Doug Phillips' wife and some of the Duggar girls, are wearing slacks. I don't see what gives me the right or the duty to tell someone else's wife or daughter how to dress herself, anyhow.