Bowzer, you are correct that yeshivos are asuring things that have no problem in halacha. Unfortunately, I just saw a note about the dress code for a yeshiva whose Rosh Yeshiva I admire very much. It said that one is not allowed to use any clips or bobby pins to fasten his yarmulka.
This is a real problem, as it means the yeshiva is focusing on chitzonius and politics, rather than yiras shomayim and ahavas yisroel. This particular yeshiva is known to be one of the most embracing of the chareidi yeshivos. I will gently speak to the Rosh Yeshiva and tell him that this is a problem. Lo dayecha ma sheasra Torah?