Subtlety is key for me...
I keep it very discreet and only hats that are clearly only understood by learned gun folks. No GLOCK, RUGER, SMITH & WESSON or HI POINT blazoned across my chest or hat. If I wear other gun type shirts, they're usually not "loud" but a simple logo and usually only at the range or at matches. No NRA sticker on the car or truck of home windows either.
I remember a good friend coming over to hide from her abusive boyfriend. It surprised me she chose poorly. He came over after seeing her car parked in the back and honked, banged on the door and yelled his fight was not with me. What I remember most was the big NRA sticker on his truck window and how that reflected badly on the institution. I was not yet a member in my early 20's and had school, women and work on my mind. Since then though I have been a member for the last 22 years, I still won't advertise, not because of shame but to avoid crime altogether or should I make that rare mistake on the road that could reflect badly on the NRA.
In '94 I shot a combat match in Boulder, Co and watched a rotund fella in tight black BDUs tucked into his swat boots, thumb break holster, HK pistol, HK 'no compromise' LS Tshirt with a swat team in action on the back,
Heckler and 'Koke' on both his arms and a HK 'no compromise' cap. Even before I had gotten more involved in pistol competition, I thought I didn't want to look like this guy, no way.
I remember attending a conference once in Jackson Hole and at a small round table discussion after getting back from fishing, I had an old LS T shirt with a single discreet HK logo. When someone asked I lied and said it was 'Harmon Kardon' as in stereo. He got the point though.