More rules to separate the members of the church from the people and make new comers feel less welcome. I have seen it and even have had people say to me that they were glad that they could come to our church “dressed down” and were accepted as they were.... jeans and all. Some had fallen on hard times and didn’t have nice clothes. They felt that when they attended a “traditional” church that everyone dressed up, that they were looked down upon. That was really a shame because they turned out to be a really nice family.
The church I attend simply says, dress modestly. We'd would rather have the people in the doors to hear the Word, even in T-shirts and jeans, than passing it by, worried about whether they're "dressed up" enough.