Although I think a fireman's outfit is a bit extreme, wearing biking leathers from head to toe isn't and nor is wearing a helmet or at the very least a bandana around the mouth and some glasses.
How many times have the characters come face-to-face with zombies and stabbed or slashed their way to survival and yet never had any blood spatter in their eyes or mouths? Pretty damn convenient if you ask me. Hell, Rick just had what? Four zombies pile on top of him and he shot all of them and didn't have even a drop of zombie-blood touch a mucous membrane. I call BS.
Does zombie blood spread the virus, or is it something in the bite? Or, does the bite inflict the disease faster, but you can get it other ways?
And, Rick was a cop and in episode one he went with Morgan & son to the police station. He couldn't pick up any bullet proof vests or other body armor there? They still had guns & ammo there, why not riot gear and the like, too?