I wear mine on my Balmoral (I leave my Glengarry in the closet). There are currently 6 Games pins on it: the past 4 years from Grandfather, and this year's Loch Norman and Gatlinburg Games. At Loch Norman this year I saw a man in his late 60s-early 70s whose Balmoral was nearly covered with souvenir pins. I also have a Henschel hat (mesh crown) that's almost full of pins from various places I've been, but I don't wear it to games.

I'd rather see a hat full of pins than some other things I've seen at games.