While not a first responder, I have worked in an Emergency Department and a hospital setting since 1992, and I can answer that, because I was always observing reactions for this very thing, being a CD myself. The answer in short is, yes, there will be comments under the breath the moment you are brought in from the ambulance. In spite of HIPPA, you will be noticed and commented on, maybe not to your face, but from one clinical staff member to another, one security officer to another, one ER Registrar to another. Ambulance crew will share their find over coffee in the EMS room about you.
I've not heard any long drawn out discussions or anything overly derogatory, but mileage varies depending on the staff. Some could give a rip, others are idiots as you'd expect. Some stay quiet because of the HIPPA mandate and don't want to get caught in a conversation that could get them in trouble, so you don't know what they think. But make no mistake, you will be noticed. It's up to folks to care about that.
Cheers,
Kalista