TinK, I had the same ?? on the sticking out lags (I am fairly sure I would win any Klutz awards given, have the scabbed & scarred knees & knuckles to prove it!) & after Iselle, I started looking into storm shuttering ideas...for the lags, you can get acorn crown nuts, but they still stick out some, I have also seen some decorative things done (like attaching drilled out shells or resin decor things like flowers or architectural looking designs over the lags & then attaching a slim nut...this still sticks out, but has less of a snag feature
A few fastener companies hurricane panel lags with a female threaded portion that is flush (warning - these are pretty pricey.... for a bolt!)
here is one:
https://www.panelmate247.com
http://www.windstormproducts.com/hurricane-hardware/
SoCal
One thing that amazed us after Iselle was the wind blown sand damage, even in Keaau town, our windward side had a light hazing, but friends down on Opihikao had major sand blasting, and one of our neighbors had a small section of roofing go airborne & into our property (their house had a purloin with termite damage, so even if there is not a lot of "stuff" by your house, you still might want to protect our windows...
We are still working on the window shutter ideas (bouncing bak & forth from plywood to polycarb panels (lighter weight is getting more & more attractive as we age..)
We have already installed one large security storm door for our double front beveled glass doors & have just ordered 2 for our sliding glass doors.... so we are whittling down our shutter requirements...
We also now have a solar PV generator...still trying to justify a DC freezer...