On the vehicles I have chosen to take the low key approach. Not that I fear break ins or reprisals, but I tend to see so many stickered up vehicles that are driven by idiots.
On clothing I go with the minimal logo approach. Shooting logos will take away the element of surprise and negate the advantage of carrying weapons; fancy electronics and photo logos make you a potential target; and stores charge me too much for the clothing to get me to advertise for them.
While we are on the subject: There are people that say a fanny pack or carry vest screams "GUN!", so they put photo equipment patches on everything. My belief is that it is only us idiots here, the gun culture, that think gun - the average bad guy thinks queer or dork when they see a fanny pack or carry vest. All a logo patch does is say "I've got high priced electronics or something, and I might have it with me."