Interesting stuff. From the very first perek we learn an interesting thought. It discusses the shomrim of the Beis HaMikdash. Kohanim would be posted throughout various roofs of the Temple every (some say day and) night. Why was this? Not because of thieves but rather in honor of Hashem's Malchus. The Gra has a twist on this. He says that they are there as a warning to those who are not fit to enter to beware (whether they are tamei, etc.)
There is a serious problem in our shuls today. People allow their kids to run wild and yell in the hallways. Talking is at an all time high. People run out before davening is over to get a good spot at the kiddush.
Where is the guarding of Hashem's house today?