not really, no-one would kill someone because what they're wearing unless they really look threatning, like a terrorist or bandit
It's been a year since the zombie virus outbreak, you've got a small group of six to look after, limited provisions, always on the move, you've all killed hundreds of zombies and raiders, and your on guard duty. You scope in on a figure and check him out. Skull patch.
Your tellin me you would risk your groups safety by letting him potentially find you? I would take the shot. If he wants to be a die hard rebel, do it in a group of 30 and carry an AR. First impressions matter. I don't care what your race, gender, religious views etc are, the second I see a skull or any sort of violent reference, boom, lights out. If he's in a gillie suit and he looks just as lost as we are, or any general attire that doesn't say "I'm a bad ass mother forgeter who does whateva," then I would at least stop to consider.
That raises an interesting question. If you see said guy from above (gillie suit) and your in the woods at night, how do you contact him WITHOUT someone stuffting themselves/getting shot/ alerting any nearby undead